MAINTAINERS: update vmxnet3 driver maintainer

Shrikrishna Khare would no longer maintain the vmxnet3 driver. Taking
over the role of vmxnet3 maintainer.

Signed-off-by: Ronak Doshi <doshir@vmware.com>
Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -14940,7 +14940,7 @@ F:	drivers/input/mouse/vmmouse.c
 F:	drivers/input/mouse/vmmouse.h
 
 VMWARE VMXNET3 ETHERNET DRIVER
-M:	Shrikrishna Khare <skhare@vmware.com>
+M:	Ronak Doshi <doshir@vmware.com>
 M:	"VMware, Inc." <pv-drivers@vmware.com>
 L:	netdev@vger.kernel.org
 S:	Maintained