board: add support for ARC AXS103 Software Development Platform

The AXS103 Platform consists of a DesignWare AXC003 CPU
Card (typically with ARC HS38 core) mounted on an
ARC Software Development Platform Mainboard with DesignWare peripherals:
 * SD/MMC contoller
 * Gigabit network contoller
 * Serial ports (8250-compatible)
 * USB 2.0
 * SPI
 * I2C

It also houses HDMI output for extrenal monitor connection.

Signed-off-by: Alexey Brodkin <[email protected]>
Cc: Anton Kolesov <[email protected]>
Cc: Thomas Petazzoni <[email protected]>
Cc: Peter Korsgaard <[email protected]>

Author: abrodkin

configs/axs103_defconfig

@@ -0,0 +1,24 @@
+BR2_arcle=y
+BR2_archs38=y
+BR2_TOOLCHAIN_BUILDROOT_LARGEFILE=y
+BR2_TOOLCHAIN_BUILDROOT_INET_IPV6=y
+BR2_TOOLCHAIN_BUILDROOT_INET_RPC=y
+BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
+BR2_PTHREAD_DEBUG=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_PACKAGE_HOST_GDB=y
+BR2_TARGET_GENERIC_HOSTNAME="axs103"
+BR2_TARGET_GENERIC_ISSUE="Welcome to the AXS103 Software Development Platform"
+# BR2_TARGET_GENERIC_GETTY is not set
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="[email protected]:foss-for-synopsys-dwc-arc-processors/linux.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="arc-3.13"
+BR2_LINUX_KERNEL_DEFCONFIG="axs103_smp"
+BR2_LINUX_KERNEL_VMLINUX=y
+BR2_PACKAGE_GDB=y
+BR2_PACKAGE_PERF=y
+BR2_PACKAGE_STRACE=y
+BR2_PACKAGE_ELFUTILS=y
+BR2_PACKAGE_HTOP=y
+BR2_TARGET_ROOTFS_INITRAMFS=y