ARM: uniphier: enable CONFIG_PINCONF

Enable the pin configuration feature for UniPhier 64 bit SoCs.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

configs/uniphier_v8_defconfig

@@ -43,6 +43,7 @@ CONFIG_NETDEVICES=y
 CONFIG_SMC911X=y
 CONFIG_SMC911X_BASE=0x0
 CONFIG_SMC911X_32_BIT=y
+CONFIG_PINCONF=y
 CONFIG_SYSRESET=y
 CONFIG_SYSRESET_PSCI=y
 CONFIG_USB=y