image_types_fsl.bbclass: Fix image generation for i.MX 6UltraLite
When the i.MX 6UltraLite (mx6ul) was separated from the SoC family mx6
(commit
24396b28f0137464cd82b9a19f705c1db180ead2) it started to create
invalid sdcard images.
This is because of SDCARD_GENERATION_COMMAND no more being triggered.
The solution in this moment is add a mx6ul override for the
SDCARD_GENERATION_COMMAND definition.
Signed-off-by: Felipe Provenzano <felipeprovenzano@maxtrack.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
