staging: r8188eu: remove psa, pda

Remove the psa, pda variables. They are set and read only once.
We can use the ieee80211 helpers directly.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220403165438.357728-10-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_recv.c

@@ -937,7 +937,7 @@ static int validate_recv_data_frame(struct adapter *adapter,
 				    struct recv_frame *precv_frame)
 {
 	u8 bretry;
-	u8 *psa, *pda, *pbssid;
+	u8 *pbssid;
 	struct sta_info *psta = NULL;
 	u8 *ptr = precv_frame->rx_data;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)precv_frame->rx_data;
@@ -946,15 +946,13 @@ static int validate_recv_data_frame(struct adapter *adapter,
 	int ret;
 
 	bretry = ieee80211_has_retry(hdr->frame_control);
-	pda = ieee80211_get_DA(hdr);
-	psa = ieee80211_get_SA(hdr);
 
 	pbssid = get_hdr_bssid(ptr);
 	if (!pbssid)
 		return _FAIL;
 
-	memcpy(pattrib->dst, pda, ETH_ALEN);
-	memcpy(pattrib->src, psa, ETH_ALEN);
+	memcpy(pattrib->dst, ieee80211_get_DA(hdr), ETH_ALEN);
+	memcpy(pattrib->src, ieee80211_get_SA(hdr), ETH_ALEN);
 
 	memcpy(pattrib->bssid, pbssid, ETH_ALEN);