ARM: dts: ti/omap: omap4-epson-embt2ws: add charger

Add charger and battery definition for the Epson Moverio BT-200 to make
charging working.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Link: https://lore.kernel.org/r/20241019111121.331477-1-andreas@kemnade.info


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