ARM: uniphier: add ProXstream2 and PH1-LD6b support

The DDR SDRAM initialization code has not been mainlined yet, but
U-Boot proper should work.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/configs/ph1_ld6b_defconfig b/configs/ph1_ld6b_defconfig
new file mode 100644
index 0000000..68f6ba8
--- /dev/null
+++ b/configs/ph1_ld6b_defconfig
@@ -0,0 +1,30 @@
+CONFIG_ARM=y
+CONFIG_ARCH_UNIPHIER=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_ARCH_UNIPHIER_PH1_LD6B=y
+CONFIG_MICRO_SUPPORT_CARD=y
+CONFIG_SYS_TEXT_BASE=0x84000000
+CONFIG_DEFAULT_DEVICE_TREE="uniphier-ph1-ld6b-ref"
+CONFIG_HUSH_PARSER=y
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_ENV_EXISTS is not set
+CONFIG_CMD_NAND=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_FPGA is not set
+CONFIG_CMD_TFTPPUT=y
+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
+CONFIG_SPL_NAND_DENALI=y
+CONFIG_UNIPHIER_SERIAL=y
+CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_STORAGE=y