Move the un-definitions of __ramfuncs__ from the sam_clockconfig.c to the common up_internal.h header file so that the attribute will be applied the same to function definitions and prototypes.

SAMA5 TWI: If running from SDRAM, BOARD_MCK_FREQUENCY is not a constant and cannot be used in pre-processor conditionals

SAMA5 SSC: If running from SDRAM, BOARD_MCK_FREQUENCY is not a constant and cannot be used in pre-processor conditionals

SAMA5 EMAC/GMAC: If running from SDRAM, BOARD_MCK_FREQUENCY is not a constant and cannot be used in pre-processor conditionals

SAMA5 CAN: If running from SDRAM, BOARD_MCK_FREQUENCY is not a constant and cannot be used in pre-processor conditionals

SAMA5 ADC: If running from SDRAM, BOARD_MCK_FREQUENCY is not a constant and cannot be used in pre-processor conditionals

SAMA5: The PIO used for the red LED is also used as the camera module reset line:  Added a configuration option to suppress use of the red LED if the PIO is used for another purpose.  Reported by David Sidrane.

Add some checks:  if getpid() or get_errno_ptr() are called very early in the initialization sequence, they would fail

configs/*/defconfig: Increase the number of pre-allocated watchdogs in configurations that use networking or USB

Back out part of  610e2aa0c224e2936fe8009ef4a2351ce607067a: Need to be able to select USB console devices when there is no /dev/console enabled.  Noted by Librae

Add logic for TM4C125GXL clocking based on prototype from from Daniel Carvalho with modifications. I think the LM4F120 may have broken before as well(?).  In any event, the LM4F120 also works well with this chanage

SAMA5 UDPHS: Fix error where bit was not cleared to acknowledge receipt of data and to setup for the next incoming data

SAMA5:  Don't use MMU PMD bufferable bit to try to control write-through vs write-back.  It does not work that way

Fix a build error when only USB device tracing is enabled (from David Sidrane).  Also an update to the USB tracing document

SAMA5: On some hardware, reconfiguring the PLL while executing out of NOR FLASH causes crashes.  This was fixed by David Sidrane by implementing RAM functions. The killer code is copied and executed from ISRAM and the crash is avoided.

SAMA5:  When booting from SDRAM, don't copy vectors to ISRAM.  Instread just set the VBAR register to add address of the vectors in SDRAM

SAMA5: Make sure the MMU and caches are disabled on power up; flush the vector region D-Cache after copying interrupt vectors; make sure that D-Cache, I-Cache, and TLBs are invalidated after modifying the AXI MATRIX remapping

sscanf(): Was returning the wrong number of conversions in many cases; Also, needs to return EOF if there were no conversions

SAMA5D3x-EK: Change name of all board-specific configuration variables so that there are no collisions with names of similar variables for other boards