MAINTAINERS: Make Mauro EDAC reviewer

Mauro hasn't really been maintaining EDAC for a long while now. Make him
a reviewer instead.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://lore.kernel.org/r/20220926180343.23346-1-bp@alien8.de

MAINTAINERS

@@ -7356,9 +7356,9 @@ F:	drivers/edac/thunderx_edac*
 
 EDAC-CORE
 M:	Borislav Petkov <bp@alien8.de>
-M:	Mauro Carvalho Chehab <mchehab@kernel.org>
 M:	Tony Luck <tony.luck@intel.com>
 R:	James Morse <james.morse@arm.com>
+R:	Mauro Carvalho Chehab <mchehab@kernel.org>
 R:	Robert Richter <rric@kernel.org>
 L:	linux-edac@vger.kernel.org
 S:	Supported