Staging: hv: storvsc: call vmbus_sendpacket_multipagebuffer directly

Don't do the interface indirection, it's not needed at all.

Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/storvsc.c

@@ -735,8 +735,7 @@ static int StorVscOnIORequest(struct hv_device *Device,
 		   vstorPacket->VmSrb.CdbLength);
 
 	if (requestExtension->Request->DataBuffer.Length) {
-		ret = Device->Driver->VmbusChannelInterface.
-			SendPacketMultiPageBuffer(Device,
+		ret = vmbus_sendpacket_multipagebuffer(Device->channel,
 				&requestExtension->Request->DataBuffer,
 				vstorPacket,
 				sizeof(struct vstor_packet),