mwifiex: make use of is_zero_ether_addr()

Use is_zero_ether_addr() instead of directly using memcmp() to
determine if the ethernet address is all zeros.

Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/scan.c

@@ -726,7 +726,6 @@ mwifiex_config_scan(struct mwifiex_private *priv,
 	struct mwifiex_ie_types_num_probes *num_probes_tlv;
 	struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
 	struct mwifiex_ie_types_rates_param_set *rates_tlv;
-	const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
 	u8 *tlv_pos;
 	u32 num_probes;
 	u32 ssid_len;
@@ -840,8 +839,7 @@ mwifiex_config_scan(struct mwifiex_private *priv,
 		 *  or BSSID filter applied to the scan results in the firmware.
 		 */
 		if ((i && ssid_filter) ||
-		    memcmp(scan_cfg_out->specific_bssid, &zero_mac,
-			   sizeof(zero_mac)))
+		    !is_zero_ether_addr(scan_cfg_out->specific_bssid))
 			*filtered_scan = true;
 	} else {
 		scan_cfg_out->bss_mode = (u8) adapter->scan_mode;