ARM: shmobile: kzm9d: Conditionally select SMSC_PHY

The kzm9d board uses has an SMSC911X ethernet controller which uses an
SMSC phy. Select SMSC_PHY for kzm9d if SMSC911X is enabled to make use of the
SMSC-specific phy driver rather than relying on the generic phy driver.

This only covers the case of multiplatform kzm9d
as there is currently no Kconfig node for non-multiplatform kzm9d.
One could be added if desired.
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Kconfig

@@ -51,6 +51,7 @@ config MACH_KZM9D
 	bool "KZM9D board"
 	depends on ARCH_EMEV2
 	select REGULATOR_FIXED_VOLTAGE if REGULATOR
+	select SMSC_PHY if SMSC911X
 
 config MACH_LAGER
 	bool "Lager board"