brcmfmac: rename variable prec to more appropriate name, ie. fifo

The term prec (precedence) is different from the fifo number. Rename
use of prec with fifo to be consistent and clear.
Reviewed-by: NHante Meuleman <meuleman@broadcom.com>
Signed-off-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c

@@ -839,7 +839,7 @@ static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
 
 static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
 				 struct brcmf_fws_mac_descriptor *entry,
-				 int prec, bool send_immediately)
+				 int fifo, bool send_immediately)
 {
 	struct sk_buff *skb;
 	struct brcmf_bus *bus;
@@ -848,10 +848,10 @@ static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
 	u32 len;
 
 	/* check delayedQ and suppressQ in one call using bitmap */
-	if (brcmu_pktq_mlen(&entry->psq, 3 << (prec * 2)) == 0)
-		entry->traffic_pending_bmp &= ~NBITVAL(prec);
+	if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
+		entry->traffic_pending_bmp &= ~NBITVAL(fifo);
 	else
-		entry->traffic_pending_bmp |= NBITVAL(prec);
+		entry->traffic_pending_bmp |= NBITVAL(fifo);
 
 	entry->send_tim_signal = false;
 	if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)