Fixed build of PCF8574 driver when its interrupts aren't enabled by config.

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

Merged in juniskane/nuttx-1/juniskane/battery_gaugeh-edited-online-with-bitbuc-1513594794596 (pull request #558)

battery_gauge.h edited online with Bitbucket

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

sched/sched: Remove DEBUGASSERT() in sched_mergepending()

Because this DEBUGASSERT() assumes that while loop executes only once.

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

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

arch/arm/src/a1x, kl, lpc11xx, lpc31xx, and nuc1xx:  Fix some compile warnings that I introduced with a possibly overzealous recent change.

arch/arm/src/sama5 and samdl:  Fix some compile warnings that I introduced with a possibly overzealous recent change.

arch/arm/src/sam34:  Fix some compile warnings that I introduced with a possibly overzealous recent change.

configs:  Still trying to get consistent name.  button driver expects board to define NUM_BUTTONS, not BOARD_NUM_BUTTONS.  That was changed in all board.h header files, but there are still references in configs/ C files to BOARD_NUM_BUTTONS

fs/fat:  Don't warn about the CONFIG_FAT_MAXFNAME being too large if long file name support is not implemented.

arch/arm/src/kinetis:  Fix some compile warnings that I introduced with a possibly overzealous recent change.

drivers/input/ft5x06.c:  Add a driver for the FT5x06 capacitive, multi-touch, touchscreen controller.  configs/lpcxpresso-lpc54628:  Add support for the the FT5x06.  Enable the driver as well as the apps/examples touchscreen test.  Untested on initial commit.

arch/arm/src/lpc17xx, lpc43xx, and stm32:  Fix some compile warnings that I introduced with a possibly overzealous recent change.

fs/nfs/nfs_vfsops.c: Correctly infer file type.  The file type is in struct nfs_statinfo_s's ns_type field, not in the ns_mode field.

configs/*/include;  Remove prototype of xyz_boardinitialize() from board.h files.  The authorative prototype is in arch/arm/src/xyz/xyz_start.h

configs/*/include;  Remove prototype of stm32_boardinitialize() from board.h files.  The authorative prototype is in arch/arm/src/stm32*/stm32*_start.h

arch/arm/src/lpc54xx:  Fix some GPIO interrupt configuration errors.  Add logic to acknowledge rising/falling edge events.  config/lpcxpresso-lpc545628:  Add an intermediate interrupt handler to support acknowledgement of rising and falling edge interrupts.

arch/arm/src/lpc54xx:  Implement GPIO interrupt support.  configs/lpcxpress-lpc54628:  Add support for the USER button.  Enable the apps/examples/button test in the NSH configuration.

arch/arm/src/lpc54xx: Complete coding of the I2C driver.  It is not yet functional and has not yet been seriously tested.  config/lpcxpresso-lpc54628:  Add support for I2C2 and for the I2C tool to the nsh configuration.

arch/arm/src/lpc43xx:  Add helper macros to simplify peripheral configuration for new drivers; rename some other helper macros to make their operation clearer.  Begin fleshing out the I2C driver.

    arch/arm/src/lpc54xx:  LCD.. Fix some miconceptions about how the video address lines are used.
    arch/arm/src/lpc54xx:  Fix some LCD BPP and BRG vs RGB settings.

arch/arm/src/lpc54xx: Fix some LCD clocking.  This eliminates the hang problem.  That is now recognizable albeit corrupted data on the display.

arch/arm/src/lpc54xx:  Add reset logic.  Some changes while debugging LDC.  Does not yet work (hangs).

configs/lpcxpresso-lpc54628:  Add the fb configuration testing the LCD.  arch/arm/src/lpc54xx:  Various fixes needed to get the fb configuration to build errorfree.  The configuration is not functional as of this writing.

arch/arm/src/lpc54xx:  Add the ported LPC1788 LCD driver to use the LPC54xx pin definitions and SYSCON.

arch/arm/src/lpc54xx:  Add configuartion support and logic it all none, some, or all of the external RAM to the system heap.

arch/arm/src/lpc54xx:  Clone the LPC1788 LCD driver.  The LPC54628 LCD interface is identical.  The initial commit is a brute force clone.  It still needs review to make sure the LDC is appropriately enabled in the SYSCON and that clocking is provided.  Also, extend the SPI 'skeleton' file so that has a place to support for SPI DMA and the SPI exchange method.

arch/arm/src/lpc54xx:  Correct the EMC divider register definition and one typo in the SDRAM setup.  SDRAM is not fully functional on this board!