Taking over responsibility for GE boards from Sebastian

I am taking over responsibility for the GE board from Sebastian Reichel.
Updating the MAINTAINERS files to reflect this.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
diff --git a/board/ge/bx50v3/MAINTAINERS b/board/ge/bx50v3/MAINTAINERS
index fafbd78..c165048 100644
--- a/board/ge/bx50v3/MAINTAINERS
+++ b/board/ge/bx50v3/MAINTAINERS
@@ -1,6 +1,6 @@
 GE BX50V3 BOARD
 M:	Ian Ray <ian.ray@ge.com>
-M:	Sebastian Reichel <sebastian.reichel@collabora.com>
+M:	Martyn Welch <martyn.welch@collabora.com>
 S:	Maintained
 F:	arch/arm/dts/imx6q-b450v3.dts
 F:	arch/arm/dts/imx6q-b650v3.dts