net/tcp: Introduce tcp receive window control based on I/O buffer

NOTE: The algorithm is still experimental but useful for http streaming.

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

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

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.