arm: add support to corstone1000 platform

Corstone1000 is a platform from arm, which includes pre
verified Corstone SSE710 sub-system that combines Cortex-A and
Cortex-M processors [0].

This code adds the support for the Cortex-A35 implementation
at host side, it contains also the necessary bits to support
the Corstone 1000 FVP (Fixed Virtual Platform) [1] and also the
FPGA MPS3 board implementation of this platform. [2]

0: https://developer.arm.com/documentation/102360/0000
1: https://developer.arm.com/tools-and-software/open-source-software/arm-platforms-software/arm-ecosystem-fvps
2: https://developer.arm.com/documentation/dai0550/c/

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/corstone1000_defconfig b/configs/corstone1000_defconfig
new file mode 100644
index 0000000..49a651a
--- /dev/null
+++ b/configs/corstone1000_defconfig
@@ -0,0 +1,52 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_TARGET_CORSTONE1000=y
+CONFIG_SYS_TEXT_BASE=0x80000000
+CONFIG_SYS_MALLOC_LEN=0x2000000
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_DEFAULT_DEVICE_TREE="corstone1000-mps3"
+CONFIG_IDENT_STRING=" corstone1000 aarch64 "
+CONFIG_SYS_LOAD_ADDR=0x82100000
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x83f00000
+CONFIG_FIT=y
+CONFIG_BOOTDELAY=3
+CONFIG_USE_BOOTARGS=y
+CONFIG_BOOTARGS="console=ttyAMA0 loglevel=9 ip=dhcp earlyprintk"
+CONFIG_BOOTCOMMAND="run retrieve_kernel_load_addr; echo Loading kernel from $kernel_addr to memory ... ; loadm $kernel_addr $kernel_addr_r 0xc00000; usb start; usb reset; run distro_bootcmd; bootefi $kernel_addr_r $fdtcontroladdr;"
+CONFIG_CONSOLE_RECORD=y
+CONFIG_LOGLEVEL=7
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_SYS_PROMPT="corstone1000# "
+CONFIG_SYS_MAXARGS=64
+CONFIG_SYS_CBSIZE=512
+# CONFIG_CMD_CONSOLE is not set
+CONFIG_CMD_BOOTZ=y
+# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_LOADM=y
+# CONFIG_CMD_LOADS is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_RTC=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_GETTIME=y
+CONFIG_OF_CONTROL=y
+CONFIG_VERSION_VARIABLE=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_REGMAP=y
+CONFIG_MISC=y
+# CONFIG_MMC is not set
+CONFIG_PHYLIB=y
+CONFIG_PHY_SMSC=y
+CONFIG_DM_ETH=y
+CONFIG_SMC911X=y
+CONFIG_PHY=y
+CONFIG_RAM=y
+CONFIG_DM_RTC=y
+CONFIG_RTC_EMULATION=y
+CONFIG_DM_SERIAL=y
+CONFIG_USB=y
+CONFIG_ERRNO_STR=y