MAINTAINERS: Add James Morse to the list of APEI reviewers

Add James to the list of reviewers of the firmware-assisted RAS glue.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: James Morse <james.morse@arm.com>
Link: https://lkml.kernel.org/r/20190205083836.21641-1-bp@alien8.de


Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>