SAMA5 OHCI: Fix an error in a DEBUGASSERT statement.  Caused assertion to fire inappropriately when a low- or full-speed device is removed and CONFIG_DEBUG=y

SAMA5D3/4: UPLL divisor to generate 48MHz for OHCI is different from the two families.  No idea why.

CCM PROCFS: Changed the configuration a bit.  I am still not happy about the coupling between procfs, mtd, and now STM32

SAM3/4 and SAMA5 Ethernet:  Fix an error in the function that determines the number of free TX descriptors

SAMA54D-EK:  Don't disable any features in the NSH configuration.  Comments updated in several files