brcmfmac: remove brcmf_sdbrcm_wait_for_event

brcmf_sdbrcm_wait_for_event is now a one line function and only
used by brcmf_sdbrcm_bus_txctl. Intergrate the function call
wait_event_interruptible_timeout into brcmf_sdbrcm_bus_txctl.
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -1786,13 +1786,6 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
 	return rxcount;
 }
 
-static void
-brcmf_sdbrcm_wait_for_event(struct brcmf_sdio *bus, bool *lockvar)
-{
-	wait_event_interruptible_timeout(bus->ctrl_wait, !*lockvar, HZ * 2);
-	return;
-}
-
 static void
 brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
 {
@@ -2662,7 +2655,9 @@ brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
 		bus->ctrl_frame_buf = frame;
 		bus->ctrl_frame_len = len;
 
-		brcmf_sdbrcm_wait_for_event(bus, &bus->ctrl_frame_stat);
+		wait_event_interruptible_timeout(bus->ctrl_wait,
+						 !bus->ctrl_frame_stat,
+						 msecs_to_jiffies(2000));
 
 		if (!bus->ctrl_frame_stat) {
 			brcmf_dbg(INFO, "ctrl_frame_stat == false\n");