Integrate meta-seco-imx/kirkstone-c26_dev

Commit: clea-os/layers/seco/meta-seco-imx@ca84055d

[FIRMWARE][i.MX8] change version of DP firmware blob

DP is not functional with the dpfw.bin currently available in BSP from package firmware-imx-8.18: replace it with dpfw.bin from package firmware-imx-8.11, tested and working at FHD and at 4K.

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Commit: clea-os/layers/seco/meta-seco-imx@6c8e6347

[MACHINE][C26] add video, HDMI-IN overlay