The Eagle board supports an optional "Function expansion board".
The expansion board adds support for HDMI OUT, HDMI capture from two
different sources, and eMMC.

This change only adds support for the two HDMI capture sources.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240224191902.2065733-1-niklas.soderlund+renesas@ragnatech.seSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>