ARM: UniPhier: call pin_init() also in the normal boot

CONFIG_UNIPHIER_SERIAL has been moved to Kconfig and
it is defined in ./.config but not in spl/.config,
so pin_init() should be called from the normal image
so that UART works correctly.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/arm/cpu/armv7/uniphier/Kconfig b/arch/arm/cpu/armv7/uniphier/Kconfig
index 011c6d9..36b7f11 100644
--- a/arch/arm/cpu/armv7/uniphier/Kconfig
+++ b/arch/arm/cpu/armv7/uniphier/Kconfig
@@ -32,6 +32,10 @@
 	  The boot mode pins are latched when the system reset is deasserted
 	  and determine which device the system should load a boot image from.
 
+config SOC_INIT
+	bool
+	default SPL_BUILD
+
 config DRAM_INIT
 	bool
 	default SPL_BUILD