imx6sololiteevk: use the common genimage template

* Generate an sdcard image based on the common Freescale genimage
  template.

Signed-off-by: Georges Savoundararadj <savoundg@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

configs/freescale_imx6sololiteevk_defconfig

@@ -20,8 +20,14 @@ BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6sl-evk"
 
 # filesystem
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/freescale/common/post-image.sh"
 BR2_TARGET_ROOTFS_EXT2=y
 
+# required tools to create the microSD image
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y
+
 # bootloader
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BOARDNAME="mx6slevk"