Drivers: net: hyperv: Cleanup the netvsc receive callback functio

Get rid of the buffer allocation in the receive path for normal packets.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hyperv/hyperv_net.h

@@ -506,6 +506,8 @@ struct netvsc_device {
 
 	/* Holds rndis device info */
 	void *extension;
+	/* The recive buffer for this device */
+	unsigned char cb_buffer[NETVSC_PACKET_SIZE];
 };
 
 /* NdisInitialize message */