MAINTAINERS: Update my email and IRC

Updated to correct IRC username and preferred email address.

Change-Id: Iaf2fdca60dbe15a08e85bb5865168e8327f12fe3
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 06b46f7..01de9df 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -50,6 +50,6 @@
 -------------------------
 
 M:  Brad Bishop <bradleyb@fuzziesquirrel.com> <radsquirrel!>
-M:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
+M:  Gunnar Mills <gmills@linux.vnet.ibm.com> <gunnarm!>
 R:  Adriana Kobylak <anoo@us.ibm.com> <anoo!>
 R:  Andrew Jeffery <andrew@aj.id.au> <amboar!>