configs/lc823450-xgevk: Add rndis configuration

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

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

lc823450 smp audio

* arch/arm/src/lc823450: Remove a workaround in up_cpu_paused()

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

* arch/arm/src/lc823450: Introduce g_gpio_lock to improve write performance in SMP mode.

    NOTE: This is a tentative solution and should be replaced with more generic one.

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

* arch/arm/src/lc823450: Add a workaround in up_txready() to avoid data corruption.

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

* configs/lc823450-xgevk: Enable CONFIG_SMP for audio

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

* configs/lc823450-xgevk: Update README.txt regarding SMP audio

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

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

configs:  Remove some old, redundant, obsolete boilerplate regarding toolchains that has been cloned into most of the board README files.

arch/arm/src/stm32:  Fix compile error when trace is enabled.  I2CEVENT_ERROR was used but never defined.

configs/stm3240g-eval:  Add support for pdcurses and the pdcurses demo programs in the 'fb' configuration.

configs/: CONFIG_QENCODER was renamed to CONFIG_SENSORS_QENCODER: update occurrences in several Kconfig files

drivers/lcd:  Make LCD driver configuration indepently selected from NX graphics configuration.  This makes things awkward and loses some error checking but is a necessary step in order to make LCD drivers usable when the NX graphics system is disabled.

drivers/lcd:  Add support for external LCD initialization required by some board logic.  configs/zpa214xpa:  Tried to get the LCD working again unsuccessfully.  Too much bit rot I suppose.

Revert "arch/arm/src/xmc4:  Serial fix... Cannot use SR1 for RXD.  It will not work on this hardware.  This means that no more than on UART can be configured per USIC."

This reverts commit 88982df0.

Revert "arch/arm/src/xmc4/xmc4_config.h:  Add a check to doubly enforce the one UART per USIC rule."

This reverts commit 63026b78.

arch/arm/src/xmc4:  Serial fix... Cannot use SR1 for RXD.  It will not work on this hardware.  This means that no more than on UART can be configured per USIC.

configs/xtrs:  Removed the XTRS configuration This was an unverified port of NuttX to a TRS-80 simulator.  It was removed because (1) it is, as I said, unverified as well as unsupported, and (2) the TRS-80 simulation is a sub-optimal platform.  That platform includes a 16-bit ROM image and only a 48Kb RAM space.

arch/arm/src/xmc4:  Do not run at 144MHz unless BOARD_FCPU_144MHZ is selected in the board.h header file.

configs:  All NX configuration... Because of recent changes to libnx/nxfonts, Supported bit per pixel must be separated specified for NXFONTs too and need to match the select BPP for NX.

sched/semaphore/spinlock.c: Disable local interrupts in spin_setbit() and spin_clrbit() in order to avoid a deadlock condition.

STM32:  Remove usb_dumpbuffer() macro from OTGFS device. It cannot be controlled via Kconfig and therefore will not be supported.

include/nuttx/audio: Remove CONFIG_SCHED_WORKQUEUE check in pcm.h

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

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