meta-quanta: add Fran Hsu and Buddy Hunag to MAINTAINERS

Fran and George have done the review and improves many meta-quanta patches
good for becoming a maintainer.

Buddy has been handle many projects in meta-quanta
good for becoming a reviewer.

Change-Id: I5950d577745025a45994c659082dadfb86422643
Signed-off-by: Samuel Jiang <Samuel.Jiang@quantatw.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index d57c096..71e2c74 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -43,5 +43,7 @@
 -------------------------
 
 M:  Benjamin Fair <benjaminfair@google.com> <benjaminfair!>
-M:  Samuel Jiang <Samuel.Jiang@quantatw.com> <samueljiang!>
 M:  Brandon Kim <brandonkim@google.com> <brandonk!>
+M:  Fran Hsu <Fran.Hsu@quantatw.com> <franhsu!>
+M:  George Hung <George.Hung@quantatw.com> <ghung!>
+R:  Buddy Huang <Buddy.Huang@quantatw.com> <buddyhunag!>