configs:  Since the touch screen initialization is now called from one-time board-initialization logic, it no longer needs protection from re-entry.

Squashed commit of the following:

    configs:  Each board now initializes the touchscreen controller as a normal part of its board bring-up.  board_tsc_setup() is gone; the touchscreen controller is now treated like any other on-board device.
    Remove all support for BOARDIOC_TSCTEST_SETUP
    Move prototype for board_tsc_setup() from include/nuttx/board.h to individual board header files.

SMP: Introduce spin_lock_wo_note() and spin_unlock_wo_note()

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

These APIs are used in sched_note.c to protect instumentation data.
The deffrence between these APIs to exsiting spin_lock() and spin_unlock()
is that they do not perform insturumentation to avoid recursive call
when SCHED_INSTRUMENTATION_SPINLOCKS=y.

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

Remove the BOARDIOC_TSCTEST_TEARNDOWN boardctl() command.  Remove all implementations of board_tsc_teardown() (the were all stubs anyway except for the simulation).

Fixed nucleo-l432kc broken build when CONFIG_USERLED_LOWER defined

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

Fixes two bugs in multi-block SD-card operations on the STM32F7 platform.  arch/arm/src/stm32f7: DBLOCKSIZE must be the size of SD-card block, not the total amount of transferred bytes.   drivers/mmcsd: respect SDIO_CAPS_DMABEFOREWRITE on CMD25.

configs/lpcxpresso-lpc54628:  Add pin definitions for USART, I2C, and SPI on the Arduino Uno connector.

sched/clock/clock_systimer.c:  Change the way that the 64-bit time is sampled.  Previously, we disabled interrupts before sampling the 64-bit timer since the uint64_t access is not atomic on most CPUs.  However, disabling (local) interrupts does not work in the SMP case.  In that case, the timer interrupt will be running on only one of the CPUs; disabling interrupts on a different CPU will provide no protection from timer rollover.  To work around this, logic was added that samples 64-bit timer is sampled twice and if 32-bit rollover was detected between samples, then loops until there is no rollover.

clock_systimer: Replace critical section APIs with spinlock APIs. (64bit only)

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

If SMP=n or SMP=y && SPINLOCK_IRQ=n, this works in the same way as before.
If SMP=y && SPINLOCK_IRQ=y, performance will be improved.

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

Master

* stm32f33xxx_hrtim.h: fix some definitions

* stm32_hrtim: fix some bugs

    stm32_hrtim: fix deadtime configuration

    stm32_hrtim: add interface to change outputs SET/RST configuration

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

arch/arm/src/lpc54xx:  The basic SPI driver is code complete but still untested.  This driver is 'basic' in that in only supports polled mode operations.

arch/arm/src/lpc54xx:  Add configuration logic to the empty SPI driver.  Still missing all data tranfer logic.

SAMD External Interrupt Controller (EIC) support

* SAMD External Interrupt Controller (EIC) support

* removed comment

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

SAMDL fix g_spi2ops and g_spi2dev using incorrect values

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

arch/arm/src/samdl: In sam_spibus_initialize(), the pinmux configuration was smashing the previous CTRLA register configuration. There are also some typos in samd_spi.h

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.