The board contains a TI TMP75 temperature sensor located near the ethernet
PHYs, attached to the thermal mass of the back case, close to main SoC.
Configure `gsbi2` for i2c mode and include `kmod-hwmon-lm75` package.
Signed-off-by: Sebastian Schaper <openwrt@sebastianschaper.net>
Link: https://github.com/openwrt/openwrt/pull/23740
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>