b43: Don't compile N-PHY code when N-PHY is disabled

There's no need to compile the N-PHY support code, when the
N-PHY support is disabled in Kconfig.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/Makefile

 b43-y				+= main.o
 b43-y				+= tables.o
-b43-y				+= tables_nphy.o
+b43-$(CONFIG_B43_NPHY)		+= tables_nphy.o
 b43-y				+= phy.o
-b43-y				+= nphy.o
+b43-$(CONFIG_B43_NPHY)		+= nphy.o
 b43-y				+= sysfs.o
 b43-y				+= xmit.o
 b43-y				+= lo.o

drivers/net/wireless/b43/nphy.h

@@ -919,6 +919,10 @@
 
 struct b43_wldev;
 
+
+#ifdef CONFIG_B43_NPHY
+/* N-PHY support enabled */
+
 int b43_phy_initn(struct b43_wldev *dev);
 
 void b43_nphy_radio_turn_on(struct b43_wldev *dev);
@@ -929,4 +933,40 @@ int b43_nphy_selectchannel(struct b43_wldev *dev, u8 channel);
 void b43_nphy_xmitpower(struct b43_wldev *dev);
 void b43_nphy_set_rxantenna(struct b43_wldev *dev, int antenna);
 
+
+#else /* CONFIG_B43_NPHY */
+/* N-PHY support disabled */
+
+
+static inline
+int b43_phy_initn(struct b43_wldev *dev)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline
+void b43_nphy_radio_turn_on(struct b43_wldev *dev)
+{
+}
+static inline
+void b43_nphy_radio_turn_off(struct b43_wldev *dev)
+{
+}
+
+static inline
+int b43_nphy_selectchannel(struct b43_wldev *dev, u8 channel)
+{
+	return -ENOSYS;
+}
+
+static inline
+void b43_nphy_xmitpower(struct b43_wldev *dev)
+{
+}
+static inline
+void b43_nphy_set_rxantenna(struct b43_wldev *dev, int antenna)
+{
+}
+
+#endif /* CONFIG_B43_NPHY */
 #endif /* B43_NPHY_H_ */