Using CRC unit to provide external SDRAM test

Need testing in hardware
Merge remote-tracking branch 'origin/add_crc'

Conflicts:
	CAM8P/cam8p.fed
	CAM8P/cam8p.l1p
	CAM8P/cam8p.l2p
	CAM8P/cam8p.uvproj
	CAM8P/main/main.c