arm64: dts: r8a7795: salvator-x: Add GPIO keys support

The Salvator-X board as a 4 lines DIP switch and 3 push buttons
connected to SoC GPIOs, meant to be used as general-purpose test keys.
Add a corresponding node in DT, mapping (semi-randomly) the DIP switch
to keys 1-4 and the push buttons to keys A-C.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
1 file changed