MAINTAINERS: Add code update repo maintainers

Change-Id: I648001431e61ef6f26bbc8f3455a961abcd0372d
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 786be3b..e480812 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -158,14 +158,14 @@
 R:  Brad Bishop <bradleyb@fuzziesquirrel.com> <radsquirrel!>
 
 @openpower-pnor-code-mgmt://*
-R:  Adriana Kobylak <anoo@us.ibm.com> <anoo!>
+M:  Adriana Kobylak <anoo@us.ibm.com> <anoo!>
+M:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
 R:  Michael Tritz <mtritz@us.ibm.com> <mtritz!>
-R:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
 
 @phosphor-bmc-code-mgmt://*
-R:  Adriana Kobylak <anoo@us.ibm.com> <anoo!>
+M:  Adriana Kobylak <anoo@us.ibm.com> <anoo!>
+M:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
 R:  Michael Tritz <mtritz@us.ibm.com> <mtritz!>
-R:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
 
 @phosphor-dbus-interfaces://*
 R:  Brad Bishop <bradleyb@fuzziesquirrel.com> <radsquirrel!>