MAINTAINERS: update my email

Update my email and change myself to Reviewer.

Signed-off-by: Lijun Pan <lijunp213@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -8517,9 +8517,9 @@ F:	drivers/pci/hotplug/rpaphp*
 
 IBM Power SRIOV Virtual NIC Device Driver
 M:	Dany Madden <drt@linux.ibm.com>
-M:	Lijun Pan <ljp@linux.ibm.com>
 M:	Sukadev Bhattiprolu <sukadev@linux.ibm.com>
 R:	Thomas Falcon <tlfalcon@linux.ibm.com>
+R:	Lijun Pan <lijunp213@gmail.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/ibm/ibmvnic.*