b43: set TMS to work with current band width for N-PHY

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/phy_common.h b/drivers/net/wireless/b43/phy_common.h
index 2ed60e5..2401bee 100644
--- a/drivers/net/wireless/b43/phy_common.h
+++ b/drivers/net/wireless/b43/phy_common.h
@@ -436,6 +436,8 @@
  */
 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on);
 
+bool b43_channel_type_is_40mhz(enum nl80211_channel_type channel_type);
+
 struct b43_c32 b43_cordic(int theta);
 
 #endif /* LINUX_B43_PHY_COMMON_H_ */