drivers-edac: add marvell mv64x60 driver

Marvell mv64x60 SoC support for EDAC.  Used on PPC and MIPS platforms.
Development and testing done on PPC Motorola prpmc2800 ATCA board.

[akpm@linux-foundation.org: make mv64x60_ctl_name static]
Signed-off-by: Dave Jiang <djiang@mvista.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk
Signed-off-by: Douglas Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>