MAINTAINERS: add cper to APEI files

The CPER records are defined as part of UEFI specs, but its
primary way to report it is via APEI/GHES. As such, let's
place it under the same umbrella to make easier for patch
review.

Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>

Author: mchehab

MAINTAINERS

@@ -314,6 +314,7 @@ R:	Mauro Carvalho Chehab <[email protected]>
 R:	Shuai Xue <[email protected]>
 L:	[email protected]
 F:	drivers/acpi/apei/
+F:	drivers/firmware/efi/cper*
 
 ACPI COMPONENT ARCHITECTURE (ACPICA)
 M:	"Rafael J. Wysocki" <[email protected]>
@@ -9511,6 +9512,7 @@ F:	arch/arm/boot/compressed/efi-header.S
 F:	arch/x86/platform/efi/
 F:	drivers/firmware/efi/
 F:	include/linux/efi*.h
+X:	drivers/firmware/efi/cper*
 
 EXTERNAL CONNECTOR SUBSYSTEM (EXTCON)
 M:	MyungJoo Ham <[email protected]>