ARM: dts: omap: omap4-epson-embt2ws: add unknown gpio outputs

Set them to the state seen in a running system, initialized
by vendor u-boot or kernel. Add line names where they are defined in the
vendor kernel.
gpio15 resets something in the display, otherwise meaning of the
gpios is not known.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20241010122957.85164-4-andreas@kemnade.info


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