Staging: hv: storvsc: call vmbus_close 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

@@ -599,7 +599,7 @@ static int StorVscOnDeviceRemove(struct hv_device *Device)
 	DPRINT_INFO(STORVSC, "storage device (%p) safe to remove", storDevice);
 
 	/* Close the channel */
-	Device->Driver->VmbusChannelInterface.Close(Device);
+	vmbus_close(Device->channel);
 
 	FreeStorDevice(storDevice);
 	return 0;