drivers/serial.c: Make sure that priority inheritance is not enabled for the signaling semaphores used in the serial driver.

Semaphores: Provide macros for sem_setprotobol() and sem_getprotocol() if priority inheritance is not enabled.  More SEM_PRIO_* definitions to include/nuttx/semaphore.h

Move protoypes for the non-standard include/semaphore.h file to the non-standard include/nuttx/semaphore.h with the other non-standard semaphore interfaces.

spi: Fix Kconfig warning

STM32 ADC: Fix compilation error when DMA isn't enabled

This commit moves the ARCH_HAVE_SPI options outside the check
for SPI. Those options don't depend on SPI, and Kconfig files
in arch/ enable them even if SPI isn't enabled.

Sourcing the driver's Kconfig in drivers/Kconfig only if
support for the driver is enabled prevents us from defining
these ARCH_HAVE options in the driver's Kconfig. We should
probably remove the other checks in drivers/Kconfig and check
if the drivers are enabled only in their Kconfig.

Add pthread_mutexattr_get/set_protocol and non-standard sem_get/set_protocol.  These may use to enable or disable priority inheritance on a single semaphore.

Merged in david_s5/nuttx-9/david_s5/i-think-that-size-is-highest-address1-b-1478039243625 (pull request #163)

I think, that Size is (highest address+1 - Base address)

Base address has been removed and if address+count >= size we are outside of the Flash

Review of last PR: Fix return value (ERROR is not a value return value in this context).  Fix some spacing.

To write the last page

Misoc: Logic on common directory should not include ANY lm32 specific header file.  The generic header file chip.h can be exported by all architectures and that is what should be included instead of lm32.h which is an inappropriate dependency.