Adapt u-boot bootscript after latest changes in 'mmcdev' variable
semantics. Now the boot media device is stored in 'mmcbootdev' variable.
Also set the device tree filename depending on the hardware variant.
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
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)