powerpc: Update MAINTAINERS for ibmvnic and VAS

Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -9337,14 +9337,12 @@ F:	drivers/pci/hotplug/rpaphp*
 
 IBM Power SRIOV Virtual NIC Device Driver
 M:	Dany Madden <drt@linux.ibm.com>
-M:	Sukadev Bhattiprolu <sukadev@linux.ibm.com>
 R:	Thomas Falcon <tlfalcon@linux.ibm.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/ibm/ibmvnic.*
 
 IBM Power Virtual Accelerator Switchboard
-M:	Sukadev Bhattiprolu <sukadev@linux.ibm.com>
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Supported
 F:	arch/powerpc/include/asm/vas.h