brcmsmac: remove set but not used variables

drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c:841:7: warning: variable free_pdu set but not used [-Wunused-but-set-variable]
drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c:842:30: warning: variable tx_rts_count set but not used [-Wunused-but-set-variable]
drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c:842:6: warning: variable tx_rts set but not used [-Wunused-but-set-variable]
drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c:843:7: warning: variable totlen set but not used [-Wunused-but-set-variable]

They are never used, so can be removed.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c

@@ -838,9 +838,8 @@ brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
 	struct dma_pub *dma = NULL;
 	struct d11txh *txh = NULL;
 	struct scb *scb = NULL;
-	bool free_pdu;
-	int tx_rts, tx_frame_count, tx_rts_count;
-	uint totlen, supr_status;
+	int tx_frame_count;
+	uint supr_status;
 	bool lastframe;
 	struct ieee80211_hdr *h;
 	u16 mcl;
@@ -917,11 +916,8 @@ brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
 			     CHSPEC_CHANNEL(wlc->default_bss->chanspec));
 	}
 
-	tx_rts = le16_to_cpu(txh->MacTxControlLow) & TXC_SENDRTS;
 	tx_frame_count =
 	    (txs->status & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT;
-	tx_rts_count =
-	    (txs->status & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT;
 
 	lastframe = !ieee80211_has_morefrags(h->frame_control);
 
@@ -989,9 +985,6 @@ brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
 			tx_info->flags |= IEEE80211_TX_STAT_ACK;
 	}
 
-	totlen = p->len;
-	free_pdu = true;
-
 	if (lastframe) {
 		/* remove PLCP & Broadcom tx descriptor header */
 		skb_pull(p, D11_PHY_HDR_LEN);