MAINTAINERS: Update my email and IRC

Updated to correct IRC username and preferred  email address.

Change-Id: I2a959f3e33c4f9c0364043e2eac21c2f93dcc561
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index d85cb3b..663df40 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -42,6 +42,6 @@
 START OF MAINTAINERS LIST
 -------------------------
 
-M:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
+M:  Gunnar Mills <gmills@linux.vnet.ibm.com> <gunnarm!>
 M:  Ed Tanous <ed.tanous@intel.com> <edtanous!>
 R:  Becca Shaw <rebecca.shaw@ibm.com>