Moved LIS3DSH from the I2C-dependent block to the SPI-block to make Make.defs consistent with the driver (SPI only) and drivers/sensors/Kconfig.

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

Moved LIS3DSH from the I2C-dependent block to the SPI-block to make Make.defs consistent with the driver (SPI only) and drivers/sensors/Kconfig.

I discovered a problem in the file drivers/serial/serial.c concerning the function uart_close(…). In the case that a serial device is opened with the flag O_NONBLOCK the function uart_close(…) blocks until all data in the buffer is transmitted. The function close(…) called on an handle opened with O_NONBLOCK should not block. The problem occurred with a CDC/ACM device.

wireless/ieee802154: Brings closer to Nuttx coding style

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

STM32L4: add dbgmcu header files

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

removed stray paren.

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

Merged in david_s5/nuttx-16/david_s5/stm32serial-dma-buffer-round-off-not-up-1494258804216 (pull request #357)

stm32:Serial DMA buffer round off not up

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

wireless/ieee802154: Completes basic receive functionality

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

wireless/ieee802154: MRF24J40: Finishes receive functionality, supports promicuous mode, and rxonidle attributes

STM32 TIM: Add method to get timer width.  Freerun timer: Use timer width to get the correct clock rollover point.