staging: brcm80211: remove unused function from bcmwifi.c

Working through a list of unused functions in the driver tree.
This file has following redundant function(s):

wf_chspec_ctlchspec

Reviewed-by: Brett Rudley <brudley@broadcom.com>
Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/include/bcmwifi.h

@@ -143,13 +143,6 @@ extern bool wf_chspec_malformed(chanspec_t chanspec);
  */
 extern u8 wf_chspec_ctlchan(chanspec_t chspec);
 
-/*
- * This function returns the chanspec that control traffic is being sent on, for legacy
- * channels this is just the chanspec, for 40MHZ channels it is the upper or lowre 20MHZ
- * sideband depending on the chanspec selected
- */
-extern chanspec_t wf_chspec_ctlchspec(chanspec_t chspec);
-
 /*
  * Return the channel number for a given frequency and base frequency.
  * The returned channel number is relative to the given base frequency.

drivers/staging/brcm80211/util/bcmwifi.c

@@ -79,29 +79,6 @@ u8 wf_chspec_ctlchan(chanspec_t chspec)
 	return ctl_chan;
 }
 
-chanspec_t wf_chspec_ctlchspec(chanspec_t chspec)
-{
-	chanspec_t ctl_chspec = 0;
-	u8 channel;
-
-	ASSERT(!wf_chspec_malformed(chspec));
-
-	/* Is there a sideband ? */
-	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) {
-		return chspec;
-	} else {
-		if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) {
-			channel = UPPER_20_SB(CHSPEC_CHANNEL(chspec));
-		} else {
-			channel = LOWER_20_SB(CHSPEC_CHANNEL(chspec));
-		}
-		ctl_chspec =
-		    channel | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
-		ctl_chspec |= CHSPEC_BAND(chspec);
-	}
-	return ctl_chspec;
-}
-
 /*
  * Return the channel number for a given frequency and base frequency.
  * The returned channel number is relative to the given base frequency.