arm: socfpga: Add config and defconfig for Arria 10

Add config and defconfig for the Arria10 and update socfpga_common.h.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
diff --git a/configs/socfpga_arria10_defconfig b/configs/socfpga_arria10_defconfig
new file mode 100644
index 0000000..46bda47
--- /dev/null
+++ b/configs/socfpga_arria10_defconfig
@@ -0,0 +1,29 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SOCFPGA=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_TARGET_SOCFPGA_ARRIA10_SOCDK=y
+CONFIG_IDENT_STRING="socfpga_arria10"
+CONFIG_DEFAULT_DEVICE_TREE="socfpga_arria10_socdk_sdmmc"
+CONFIG_DEFAULT_FDT_FILE="socfpga_arria10_socdk_sdmmc.dtb"
+CONFIG_SPL=y
+CONFIG_CMD_BOOTZ=y
+# CONFIG_CMD_IMLS is not set
+CONFIG_CMD_ASKENV=y
+CONFIG_CMD_GREPENV=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_DOS_PARTITION=y
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_SPL_DM=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_DM_GPIO=y
+CONFIG_DWAPB_GPIO=y
+CONFIG_DM_MMC=y
+CONFIG_SYS_NS16550=y
+CONFIG_USE_TINY_PRINTF=y