MAINTAINERS: add myself as cocoa UI co-maintainer

Add myself to the maintainers list for the cocoa UI; status
remains "Odd Fixes".
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Acked-by: NAndreas Färber <andreas.faerber@web.de>
Message-id: 1387207075-10280-1-git-send-email-peter.maydell@linaro.org

MAINTAINERS

@@ -714,6 +714,7 @@ F: ui/
 
 Cocoa graphics
 M: Andreas Färber <andreas.faerber@web.de>
+M: Peter Maydell <peter.maydell@linaro.org>
 S: Odd Fixes
 F: ui/cocoa.m