qcacmn: Rewrite util_gen_new_bssid functionality

qdf_do_div is not helping  for modulo operation and always returns 0 in
32 bit image resulting in same base BSSID is always returned for all
the VAP's.With 64 bit image no issues are seen.

Change-Id: I50e500f57713ce080447b9a5cb1e615018222adb
CRs-Fixed: 2565183

umac/scan/dispatcher/src/wlan_scan_utils_api.c

@@ -1541,22 +1541,16 @@ static void util_gen_new_bssid(uint8_t *bssid, uint8_t max_bssid,
 			       uint8_t mbssid_index,
 			       uint8_t *new_bssid_addr)
 {
-	uint64_t bssid_tmp = 0, new_bssid = 0;
-	uint64_t lsb_n;
+	uint8_t lsb_n;
 	int i;
 
 	for (i = 0; i < QDF_MAC_ADDR_SIZE; i++)
-		bssid_tmp = bssid_tmp << 8 | bssid[i];
+		new_bssid_addr[i] = bssid[i];
 
-	lsb_n = bssid_tmp & ((1 << max_bssid) - 1);
-	new_bssid = bssid_tmp;
-	new_bssid &= ~((1 << max_bssid) - 1);
-	new_bssid |= qdf_do_div((lsb_n + mbssid_index), (1 << max_bssid));
+	lsb_n = new_bssid_addr[5] & ((1 << max_bssid) - 1);
 
-	for (i = QDF_MAC_ADDR_SIZE - 1; i >= 0; i--) {
-		new_bssid_addr[i] = new_bssid & 0xff;
-		new_bssid = new_bssid >> 8;
-	}
+	new_bssid_addr[5] &= ~((1 << max_bssid) - 1);
+	new_bssid_addr[5] |= (lsb_n + mbssid_index) % (1 << max_bssid);
 }
 
 static uint32_t util_gen_new_ie(uint8_t *ie, uint32_t ielen,