ARM: dts: omap: omap4-epson-embt2ws: add GPIO expander

Define the GPIO expander which controls at least some camera gpios.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20241010122957.85164-5-andreas@kemnade.info


Signed-off-by: Kevin Hilman <khilman@baylibre.com>