ARM: uniphier: enable simple-bus driver for SPL

In UniPhier device trees, pinctrl device nodes are located under the
simple-bus (AMBA).

This is needed to bind pinctrl devices in SPL.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

configs/ph1_ld4_defconfig

@@ -17,6 +17,7 @@ CONFIG_CMD_PING=y
 CONFIG_CMD_TIME=y
 # CONFIG_CMD_MISC is not set
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_SIMPLE_BUS=y
 CONFIG_NAND_DENALI=y
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8

configs/ph1_pro4_defconfig

@@ -16,6 +16,7 @@ CONFIG_CMD_PING=y
 CONFIG_CMD_TIME=y
 # CONFIG_CMD_MISC is not set
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_SIMPLE_BUS=y
 CONFIG_NAND_DENALI=y
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8

configs/ph1_sld8_defconfig

@@ -17,6 +17,7 @@ CONFIG_CMD_PING=y
 CONFIG_CMD_TIME=y
 # CONFIG_CMD_MISC is not set
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_SIMPLE_BUS=y
 CONFIG_NAND_DENALI=y
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8