EDAC: Add James Morse as a reviewer

With the growing amount of ARM[,64] EDAC enablement happening, add James
as a reviewer for the ARM bits.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: James Morse <james.morse@arm.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: https://lkml.kernel.org/r/20190121123941.28247-1-bp@alien8.de