staging: r8188eu: use ieee80211 helper to read the qos tid

Replace the driver-specific GetPriority macro with ieee80211_get_tid,
which does exactly the same thing.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220413200742.276806-2-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_recv.c

@@ -978,7 +978,7 @@ static int validate_recv_data_frame(struct adapter *adapter,
 	pattrib->ack_policy = 0;
 	/* parsing QC field */
 	if (pattrib->qos) {
-		pattrib->priority = GetPriority((ptr + 24));
+		pattrib->priority = ieee80211_get_tid(hdr);
 		pattrib->ack_policy = GetAckpolicy((ptr + 24));
 		pattrib->amsdu = GetAMsdu((ptr + 24));
 		pattrib->hdrlen = 26;

drivers/staging/r8188eu/include/wifi.h

@@ -211,8 +211,6 @@ enum WIFI_REG_DOMAIN {
 #define SetPriority(pbuf, tid)	\
 	*(__le16 *)(pbuf) |= cpu_to_le16(tid & 0xf)
 
-#define GetPriority(pbuf)	((le16_to_cpu(*(__le16 *)(pbuf))) & 0xf)
-
 #define SetEOSP(pbuf, eosp)	\
 		*(__le16 *)(pbuf) |= cpu_to_le16((eosp & 1) << 4)