sem_setprotocol: Handle a case of missing proxy for sem_setprotocol.  Reorder so that (1) this error is avoided, and (2) >No proxy is needed if priority inheritance is not enabled.

arch: Disable priority inheritance on all semaphores used for signaling in the rest of the MCU drivers

Back out the rest of commit 1e754402.  Newlib support will not be accepted into the NuttX repository.

Back out the rest of commit 1e754402.  Newlib support will not be accepted into the NuttX repository.

SAMV7: Fix to SPI-Master driver.  Without this the chip select decoding feature will not work properly

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.