zedboard: add Avnet Zedboard support.

This is the buildroot board support for the Avnet Zedboard. The Zedboard is

a development board based on the Xilinx Zynq-7000 based All-Programmable

System-On-Chip.

Zedboard information including schematics, reference designs, and manuals are

available from http://www.zedboard.org .

To boot the Zedboard using a buildroot generated image copy the following files

to the sdcard:

	zynq-zed.dtb -> devicetree.dtb

	rootfs.cpio.gz.uboot -> uramdisk.image.gz

	uImage -> uImage

BR2_arm=y

BR2_cortex_a9=y

BR2_ARM_ENABLE_NEON=y

# Lock to 3.8 headers as the kernel is based off 3.8

BR2_KERNEL_HEADERS_VERSION=y

BR2_DEFAULT_KERNEL_VERSION="3.8"

BR2_TARGET_GENERIC_GETTY_PORT="ttyPS0"

# Kernel

BR2_LINUX_KERNEL=y

BR2_LINUX_KERNEL_CUSTOM_GIT=y

BR2_LINUX_KERNEL_CUSTOM_REPO_URL="git://github.com/Xilinx/linux-xlnx.git"

BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="xilinx-v14.5"

BR2_LINUX_KERNEL_DEFCONFIG="xilinx_zynq"

BR2_LINUX_KERNEL_UIMAGE_LOADADDR="0x8000"

BR2_LINUX_KERNEL_DTS_SUPPORT=y

BR2_LINUX_KERNEL_INTREE_DTS_NAME="zynq-zed"

# Root filesystem

BR2_TARGET_ROOTFS_CPIO=y

BR2_TARGET_ROOTFS_CPIO_GZIP=y

BR2_TARGET_ROOTFS_CPIO_UIMAGE=y

# Bootloader

BR2_TARGET_UBOOT=y

BR2_TARGET_UBOOT_BOARDNAME="zynq_zed"

BR2_TARGET_UBOOT_CUSTOM_GIT=y

BR2_TARGET_UBOOT_CUSTOM_REPO_URL="git://github.com/Xilinx/u-boot-xlnx.git"

BR2_TARGET_UBOOT_CUSTOM_REPO_VERSION="xilinx-v14.5"

BR2_TARGET_UBOOT_FORMAT_ELF=y