configs: add defconfig for Atmel at91sam9x5ek

This supports:
 - at91sam9g15ek
 - at91sam9g25ek
 - at91sam9g35ek
 - at91sam9x25ek
 - at91sam9x35ek

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

configs/at91sam9x5ek_defconfig

@@ -0,0 +1,25 @@
+BR2_arm=y
+BR2_arm926t=y
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="3.18"
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_3_18=y
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/linux4sam/linux-at91.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="03329ca4cf6b94acc5c65b59b2d1f90fdeee0887"
+BR2_LINUX_KERNEL_DEFCONFIG="at91_dt"
+BR2_LINUX_KERNEL_ZIMAGE=y
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="at91sam9g15ek at91sam9g25ek at91sam9g35ek at91sam9x25ek at91sam9x35ek"
+BR2_TARGET_ROOTFS_UBIFS=y
+BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x1f000
+BR2_TARGET_ROOTFS_UBI=y
+BR2_TARGET_ROOTFS_UBI_SUBSIZE=2048
+BR2_TARGET_AT91BOOTSTRAP3=y
+BR2_TARGET_AT91BOOTSTRAP3_DEFCONFIG="at91sam9x5eknf_uboot"
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BOARDNAME="at91sam9x5ek_nandflash"
+BR2_TARGET_UBOOT_CUSTOM_GIT=y
+BR2_TARGET_UBOOT_CUSTOM_REPO_URL="git://github.com/linux4sam/u-boot-at91.git"
+BR2_TARGET_UBOOT_CUSTOM_REPO_VERSION="677f3c2340b72131beebace8e96cac17b9569887"
+BR2_PACKAGE_HOST_SAM_BA=y