smsc911x: Unconditionally include linux/smscphy.h in smsc911x.h

The energy detect enable/disable code in the driver uses some
register defines in this header unconditionally, so guarding
the smscphy.h header include with CONFIG_SMSC_PHY leads to
build failures in some configurations.
Reported-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/smsc/smsc911x.h

@@ -401,8 +401,6 @@
 #include <asm/smsc911x.h>
 #endif
 
-#ifdef CONFIG_SMSC_PHY
 #include <linux/smscphy.h>
-#endif
 
 #endif				/* __SMSC911X_H__ */