This is needed in the context of CC6 variants 0x7 and 0x9 (EMMC-less).
Changes:
* Do not use 'meta-fsl-arm' image generation class: removed include and
override SDCARD generation function
* Use same VFAT boot image for EMMC and SD card. The u-boot bootscript
has been adapted to be able to boot Linux from both SD and EMMC.
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
(cherry picked from commit 8b8456b8fd90facd92dfc87632effa582ca60475)
Javier Viguera