Unify sensor debug.  ADX driver was using input debug; LM75 and QENCODE that their own custom debug.  Now all use CONFIG_DEBUG_SENSOR, sndbg()

Freedom-KL25Z: Add board specific code to interface with ADXL345 driver.  From Alan Carvalho de Assis

Add GPIO interrupt capability for the KL architecture. The patch is almost the same as kinetis_pinirq.c, just minor modifications and rename kl_pinirq to kl_gpioirq to make it more generic to developers.  From Alan Carvalho de Assis

Sempahores:  Add logic to clean up after task_delete() or pthread_cancel() if the task happens to be waiting on a semaphore when it is cancelled

device, while it is being terminated by pthread_cancel(), then
uart_close() gets called, but the semaphore (dev->recv.sem in the above
example) is still blocked.

This means that once the serial device is opened next time, data will
arrive on the serial port (and driver interrupts handled as normal), but
the received characters never arrive in the reader thread.

This patch addresses the problem by re-initializing the semaphores on the
last uart_close() on the device.

STM32 OTG HS DEV (in FS mode): Disable ULPI clock enable in RCC AHB1 Register.  If Both ULPI and the FS clock enable bits are set in FS mode, then the ARM never awakens froom WFI due to a chip issue.  From Ken Pettit

Tiva I2C: Don't try to ACK and STOP on the same byte.  Improve logic that suppresses STOP on a repeated start