staging: rtl8723bs: remove custom is_zero_mac_addr() function

Remove the custom function is_zero_mac_addr() and replace all calls to it
with the default kernel function is_zero_ether_addr() to avoid
duplicating existing code.

Signed-off-by: Nikolay Kulikov <nikolayof23@gmail.com>
Link: https://patch.msgid.link/20260323150650.7168-5-nikolayof23@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: nikolayof12

drivers/staging/rtl8723bs/core/rtw_ioctl_set.c

@@ -11,7 +11,7 @@ u8 rtw_validate_bssid(u8 *bssid)
 {
 	u8 ret = true;
 
-	if (is_zero_mac_addr(bssid) ||
+	if (is_zero_ether_addr(bssid) ||
 	    is_broadcast_mac_addr(bssid) ||
 	    is_multicast_mac_addr(bssid))
 		ret = false;

drivers/staging/rtl8723bs/core/rtw_mlme.c

@@ -1675,7 +1675,7 @@ static int rtw_check_roaming_candidate(struct mlme_priv *mlme
 		goto exit;
 
 	/* got specific addr to roam */
-	if (!is_zero_mac_addr(mlme->roam_tgt_addr)) {
+	if (!is_zero_ether_addr(mlme->roam_tgt_addr)) {
 		if (!memcmp(mlme->roam_tgt_addr, competitor->network.mac_address, ETH_ALEN))
 			goto update;
 		else

drivers/staging/rtl8723bs/include/ieee80211.h

@@ -518,12 +518,6 @@ static inline int is_broadcast_mac_addr(const u8 *addr)
 		(addr[3] == 0xff) && (addr[4] == 0xff) && (addr[5] == 0xff));
 }
 
-static inline int is_zero_mac_addr(const u8 *addr)
-{
-	return ((addr[0] == 0x00) && (addr[1] == 0x00) && (addr[2] == 0x00) &&   \
-		(addr[3] == 0x00) && (addr[4] == 0x00) && (addr[5] == 0x00));
-}
-
 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)