Fix emails and IRC names in MAINTAINERS

The email address for Deepak does not match with the one in gerrit,
and Tom's IRC nickname is missing the `!` character, which cause
the obmc-gerrit tool failure.

Update the email address and fix the IRC nickname.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: I954f22380091fdff5a97c831e35f806bfffb51db
diff --git a/MAINTAINERS b/MAINTAINERS
index 37c5bdd..9dedf8e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -62,6 +62,6 @@
 START OF MAINTAINERS LIST
 -------------------------
 
-M:  Deepak Kodihalli <dkodihal@linux.vnet.ibm.com> <dkodihal!>
-M:  Tom Joseph <tomjose@linux.vnet.ibm.com> <tomjose>
+M:  Deepak Kodihalli <dkodihal@in.ibm.com> <dkodihal!>
+M:  Tom Joseph <tomjose@linux.vnet.ibm.com> <tomjose!>
 M:  John Wang <wangzqbj@inspur.com> <JohnWang!>