MAINTAINERS: Step back to designated reviewer for mm/

With having to take over Lars' role as community manager, I don't have
the necessary time to review the mm/ subsystem.  Step back to being only
a designated reviewer, reverting mantainership to the x86 maintianers.

While here, fix my e-mail address in other places.

Signed-off-by: George Dunlap <george.dunlap@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wl@xen.org>

MAINTAINERS

@@ -439,7 +439,7 @@ S:	Supported
 F:	xen/common/sched/rt.c
 
 SCHEDULING
-M:	George Dunlap <george.dunlap@eu.citrix.com>
+M:	George Dunlap <george.dunlap@citrix.com>
 M:	Dario Faggioli <dfaggioli@suse.com>
 S:	Supported
 F:	xen/common/sched/
@@ -550,7 +550,9 @@ F:	xen/include/asm-x86/hvm/ioreq.h
 F:	xen/include/public/hvm/ioreq.h
 
 X86 MEMORY MANAGEMENT
-M:	George Dunlap <george.dunlap@eu.citrix.com>
+M:	Jan Beulich <jbeulich@suse.com>
+M:	Andrew Cooper <andrew.cooper3@citrix.com>
+R:	George Dunlap <george.dunlap@citrix.com>
 S:	Supported
 F:	xen/arch/x86/mm/
 
@@ -581,7 +583,7 @@ F:	xen/include/asm-x86/guest/hyperv-tlfs.h
 F:	xen/include/asm-x86/hvm/viridian.h
 
 XENTRACE
-M:	George Dunlap <george.dunlap@eu.citrix.com>
+M:	George Dunlap <george.dunlap@citrix.com>
 S:	Supported
 F:	tools/xentrace/
 F:	xen/common/trace.c
@@ -597,7 +599,7 @@ F:	docs/misc/xsm-flask.txt
 
 THE REST
 M:	Andrew Cooper <andrew.cooper3@citrix.com>
-M:	George Dunlap <George.Dunlap@eu.citrix.com>
+M:	George Dunlap <george.dunlap@citrix.com>
 M:	Ian Jackson <ian.jackson@eu.citrix.com>
 M:	Jan Beulich <jbeulich@suse.com>
 M:	Julien Grall <julien@xen.org>