arm: socfpga: A5 SoCDK use environment in common header

This removes the default environment from the A5 socdk headers
and instead uses the common environment provided in
socfpga_common.h which now uses distro boot.

Add support to boot from the custom a2 type partition.

Change default devicetree name to match devicetree name in
upstream kernel source.

Signed-off-by: Dalon Westergreen <dwesterg@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>

--
Changes in v3:
 - Fix small typo in defconfig, missing "C"
Changes in v2:
 - Remove unneeded CONFIG_BOOTFILE
 - Fix dtb name

a5config test

Signed-off-by: Dalon Westergreen <dwesterg@gmail.com>
diff --git a/configs/socfpga_arria5_defconfig b/configs/socfpga_arria5_defconfig
index 43c51fe..5aa8e25 100644
--- a/configs/socfpga_arria5_defconfig
+++ b/configs/socfpga_arria5_defconfig
@@ -4,6 +4,7 @@
 CONFIG_TARGET_SOCFPGA_ARRIA5_SOCDK=y
 CONFIG_SPL_STACK_R_ADDR=0x00800000
 CONFIG_DEFAULT_DEVICE_TREE="socfpga_arria5_socdk"
+CONFIG_DEFAULT_FDT_FILE="socfpga_arria5_socdk.dtb"
 CONFIG_FIT=y
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE=y
@@ -64,3 +65,5 @@
 CONFIG_G_DNL_VENDOR_NUM=0x0525
 CONFIG_G_DNL_PRODUCT_NUM=0xa4a5
 CONFIG_USE_TINY_PRINTF=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE=0xa2