Integrate meta-seco-imx/kirkstone-lvds_cha_wvga
Commit: clea-os/layers/seco/meta-seco-imx@8474bfd0
[MACHINE][D18] update LVDS WVGA overlays
- rename overlay: add panel model UMSH-8596MD to LVDS ChB WVGA label
- add LVDS ChA WVGA NE070NB-04F overlay
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Commit: clea-os/layers/seco/meta-seco-imx@61183fc0
[MACHINE][D18] update multi-video overlay handling
To handle multi-video overlay options instead of a single unified overlay for every option use multiple intercompatible video overlay to be used in several combinations. The selection of the correct combination is done by the seco_config tool. Remove the now superfluous multi-video unified overlays.