net/netvsc: fix sizeof calculation

[ upstream commit 86fb73f5bf401afc9d52144f27e6d1cf4f64348b ]

Found by cppcheck.

drivers/net/netvsc/hn_rndis.c:332:21: warning:
 Found calculation inside sizeof().
 [sizeofCalculation]  if (len < sizeof(3 * sizeof(uint32_t))) {

Fixes: 4e9c73e ("net/netvsc: add Hyper-V network device")

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Long Li <longli@microsoft.com>

drivers/net/netvsc/hn_rndis.c

@@ -329,7 +329,8 @@ void hn_rndis_receive_response(struct hn_data *hv,
 
 	hn_rndis_dump(data);
 
-	if (len < sizeof(3 * sizeof(uint32_t))) {
+	/* Check we can read first three data fields from RNDIS header */
+	if (len < 3 * sizeof(uint32_t)) {
 		PMD_DRV_LOG(ERR,
 			    "missing RNDIS header %u", len);
 		return;