MAINTAINERS: Add Android Ion as a separate entry

The android drivers have a few other people reviewing patches.
Add a separate entry to ensure patches go to the right people.
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -776,6 +776,15 @@ S:	Supported
 F:	drivers/android/
 F:	drivers/staging/android/
 
+ANDROID ION DRIVER
+M:	Laura Abbott <labbott@redhat.com>
+M:	Sumit Semwal <sumit.semwal@linaro.org>
+L:	devel@driverdev.osuosl.org
+S:	Supported
+F:	drivers/staging/android/ion
+F:	drivers/staging/android/uapi/ion.h
+F:	drivers/staging/android/uapi/ion_test.h
+
 AOA (Apple Onboard Audio) ALSA DRIVER
 M:	Johannes Berg <johannes@sipsolutions.net>
 L:	linuxppc-dev@lists.ozlabs.org