MAINTAINERS: Add Adriana and Deepak as reviewers

Stolen from the MAINTAINERS file of phosphor-host-ipmid, and has good
synergy with mboxbridge.

Change-Id: If62d195e8d96421aebf0b1f83872cc40e24709dd
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/MAINTAINERS b/MAINTAINERS
index 89a8fd8..4a60fca 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -43,3 +43,5 @@
 -------------------------
 
 M:  Andrew Jeffery <andrew@aj.id.au> <!amboar>
+R:  Adriana Kobylak <anoo@us.ibm.com> <anoo!>
+R:  Deepak Kodihalli <dkodihal@in.ibm.com> <dkodihal!>