MAINTAINERS: alter EFI section

To get past the recurring friction on the approach to take wrt
workarounds needed for various firmware flaws, I'm stepping down as the
maintainer of our code interfacing with EFI firmware. Two new
maintainers are being introduced in my place.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Marek Marczykowski <marmarek@invisiblethingslab.com>
Acked-by: Daniel P. Smith <dpsmith@apertussolutions.com>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>

MAINTAINERS

@@ -308,7 +308,9 @@ F:	automation/eclair_analysis/
 F:	automation/scripts/eclair
 
 EFI
-M:	Jan Beulich <jbeulich@suse.com>
+M:	Daniel P. Smith <dpsmith@apertussolutions.com>
+M:	Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
+R:	Jan Beulich <jbeulich@suse.com>
 S:	Supported
 F:	xen/arch/x86/efi/
 F:	xen/arch/x86/include/asm/efi*.h