b43: make forcing clock common (HT-PHY also uses that)

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/phy_common.h

@@ -444,6 +444,8 @@ void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on);
 
 bool b43_channel_type_is_40mhz(enum nl80211_channel_type channel_type);
 
+void b43_phy_force_clock(struct b43_wldev *dev, bool force);
+
 struct b43_c32 b43_cordic(int theta);
 
 #endif /* LINUX_B43_PHY_COMMON_H_ */