MAINTAINERS: change the status of vexpress board to Orphan

The email address of Matt Waddel is no longer working.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alexei Fedorov <alexie.fedorov@arm.com>

board/armltd/vexpress/MAINTAINERS

@@ -7,7 +7,7 @@ F:	configs/vexpress_ca15_tc2_defconfig
 
 VEXPRESS_CA5X2 BOARD
 M:	Matt Waddel <matt.waddel@linaro.org>
-S:	Maintained
+S:	Orphan (since 2014-08)
 F:	include/configs/vexpress_ca5x2.h
 F:	configs/vexpress_ca5x2_defconfig
 F:	include/configs/vexpress_ca9x4.h