SAMA5D HSMCI: Add method to do RX transfer without DMA.  The 8-byte SCR transfer was failing silently with the DMA transfer, leaving the SD card in single bit mode

The SAMA5D4-EK NSH and NxWM configurations now have the auto-mounter configured to automatically mount the FAT file system on HSMCI0 at /mnt/sdcard

Add support for an automounter that will automatically mount and unmount a file system a media is inserted and removed

SAMA5D4-EK: Add logic to disable the faulty PMIC.  This must be done with JP23 open.  It is perfomed only from the DRAMBOOT loader

PCM: Major simplification of the sub-sampling design.  Now need no extra buffers because sub-sampling is done in place

NxPlayer needs to set curbyte field to zero before enqueuing a buffer.  Otherwise, it looks like beginning of the buffer has already been consumed