MAINTAINERS: Update after GEHC spin-off

Update our email addresses, from @ge.com to @gehealthcare.com, after GE
HealthCare was spun-off from GE.

Remove Antti, who no longer works on the project.

Signed-off-by: Ian Ray <ian.ray@gehealthcare.com>
diff --git a/board/ge/b1x5v2/MAINTAINERS b/board/ge/b1x5v2/MAINTAINERS
index 3196ddb..7312f4b 100644
--- a/board/ge/b1x5v2/MAINTAINERS
+++ b/board/ge/b1x5v2/MAINTAINERS
@@ -1,6 +1,6 @@
 GE B1X5V2 BOARD
-M:	Huan 'Kitty' Wang <HuanWang@ge.com>
-M:	Ian Ray <ian.ray@ge.com>
+M:	Huan 'Kitty' Wang <HuanWang@gehealthcare.com>
+M:	Ian Ray <ian.ray@gehealthcare.com>
 M:	Martyn Welch <martyn.welch@collabora.com>
 S:	Maintained
 F:	arch/arm/dts/imx6dl-b1x5v2.dts