MAINTAINERS: Make Yazen Ghannam maintainer for EDAC-AMD64

Also, include the mce_amd* files under this section.
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210525194834.2710362-1-Yazen.Ghannam@amd.com

MAINTAINERS

@@ -6437,10 +6437,11 @@ F:	Documentation/filesystems/ecryptfs.rst
 F:	fs/ecryptfs/
 
 EDAC-AMD64
-M:	Borislav Petkov <bp@alien8.de>
+M:	Yazen Ghannam <yazen.ghannam@amd.com>
 L:	linux-edac@vger.kernel.org
-S:	Maintained
+S:	Supported
 F:	drivers/edac/amd64_edac*
+F:	drivers/edac/mce_amd*
 
 EDAC-ARMADA
 M:	Jan Luebbe <jlu@pengutronix.de>