lc823450 dvfs

Approved-by: Gregory Nutt <gnutt@nuttx.org>

Apply the latest Kconfig to all configurations.
Enable DVFS in audio and rndis. Add telnet character mode to rndis.

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

Add notes on DVFS (Dynamic Voltage and Frequencey Scaling)

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

This version only supports manual mode and Vdd1 is fixed to 1.2V.

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

drivers/net: Add support for telnet character mode

Approved-by: Gregory Nutt <gnutt@nuttx.org>

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

    configs/flipnclick-pic32mz:  Switch the serial console to UART4.  Clean up some minor issues the LED options.
    configs/flipnclick-pic32mz:  Add support for two on-board buttons:  T1 and T2.
    configs/flipnclick-pic32mz:  Adds basic board support for the Mikroe Flip&Click PIC32MZ board.  Initial commit is just the configs/pic32mz-starterkit with some name chanages.

    arch/mips/src/pic32mz:  Commits the basic architecture port for the PIC32MZEF.
    arch/mips/src/pic32mz:  Begin adding PIC32MZEF files. Initial commit are simply PIC32MZEC files with name changes.
    arch/mips/include/pic32mz:  Add support for the PIC32MZEF family.

    configs/flipnclick-sam3x:  Add support for the 4 user-controllable LEDs on the board.
    configs/flipnclick-sam3x:  Add board support for the Mikroe Flip&Click SAM3X.
    configs/arduino-due:  Update this old configuration so that it is structured a little more like recent board support.

    fs/nxffs:  Giving up on truncate() support in NXFFS for now.  There is too much that has to be done to make that work.
    configs/sim:  Add support for testing NXFFS.

    fs/smartfs:  Add logic needed to ftruncate to shrink a file to any arbitrary size.
    fs/smartfs:  Repartition some functionality to better fit in new ftruncate features.

FAT. Effectively handles the situation when a new file position is within the current sector.

* Find begin of the next token

* EOL

* revert

* Accelerates the work of the FS with a multitude of operations to write small pieces of data within the current sector.

Approved-by: Gregory Nutt <gnutt@nuttx.org>

net/route:  Fix a couple of compile-related issues that have crept in sense the last time the file-based routing table was used.

Squashed commit of the following:

    fs/fat:  Resolves issues with truncating the cluster chain when shrinking files via ftruncate().
    fs/fat:  First cut at implementation file shrinkage logic needed to support ftruncate().  Certainly shrinks the file size but it does not appear to correctly disconnect the cluster chains.
    fs/fat:  Restructure some functions in files to better support forthcoming file shrinkage logic.  Put framework for file shrinkage in place.  That logic is incomplete on initial commit.

fs/nxffs: truncate method is implementated in a separate file and should have been in a previous commit.

    fs/nxffs:  Add partial implementation of the truncate method:  It extend files, but cannot yet shrink them.
    fs/smartfs:  Add partial implementation of the truncate method:  It extend files, but cannot yet shrink them.
    fs/fat:  Add partial implementation of the truncate method:  It extend files, but no yet shrink them.
    fs/nfs:  Add support for the truncate method to the NFS file system.

    fs: Add truncate() support for userfs
    fs/unionfs:  Add truncate() support to the unionfs
    fs/tmpfs:  Add ftruncate() support to tmpfs
    syscall/: Add system call support for ftruncate()
    net/route:  Adding ftruncate() support eliminates an issue in file-based routing table management.
    fs:  Add basic framework to support truncate() and ftruncate().  The infrastructure is complete.  Now, however, the actual implementation of ftruncate() will have to be done for each file system.

stm32/chip.h: minor fixes for STM32F334

Approved-by: Gregory Nutt <gnutt@nuttx.org>

net/arp:  Fix IGMP multicast address computation on Nuttx network stack.  This change fixes the IGMP address computation to allow multicast UDP messages. The destination address was created with the incorrect bytes of the given IPv4 address.

arch/arm/src/lpc54xx:  Add some hooks for future 802.1q VLAN support.  configs/lpcxpresso-lpc54628:  Automatically bring up network in the netnsh configuration.

Add FPU to xmc4 ostest

* remove +x from makefiles

* preserve .gdbinit across make clean

* add FPU support to ostest on xmc4

* add FPU test to ostest on xmc4

Approved-by: Gregory Nutt <gnutt@nuttx.org>

arch/arm/src/lpc54xx:  Correct handling of the Ethernet RBU error.  With this fix, Ethernet now appears to be fully functional although still undertested.