MAINTAINERS: Add ARM and arm64 EFI specific files to EFI subsystem

Since I will be co-maintaining the EFI subsystem, it makes sense to
mention the ARM and arm64 EFI bits in the EFI section in MAINTAINERS
so that Matt, the list and I get cc'ed on proposed changes.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: M: Matthew Garrett <matthew.garrett@nebula.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20161112213237.8804-3-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>

MAINTAINERS

@@ -4631,12 +4631,14 @@ L:	linux-efi@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
 S:	Maintained
 F:	Documentation/efi-stub.txt
-F:	arch/ia64/kernel/efi.c
+F:	arch/*/kernel/efi.c
 F:	arch/x86/boot/compressed/eboot.[ch]
-F:	arch/x86/include/asm/efi.h
+F:	arch/*/include/asm/efi.h
 F:	arch/x86/platform/efi/
 F:	drivers/firmware/efi/
 F:	include/linux/efi*.h
+F:	arch/arm/boot/compressed/efi-header.S
+F:	arch/arm64/kernel/efi-entry.S
 
 EFI VARIABLE FILESYSTEM
 M:	Matthew Garrett <matthew.garrett@nebula.com>