wifi: rt2800soc: allow loading from OF

wifi: rt2800soc: allow loading from OF

Add a single binding to help the already present dts files load the
driver. More are possible but there doesn't seem to be a significant
difference between them to justify this.

Use wifi name per dtschema requirements.

Added OF dependency to SOC CONFIG as adding of_match_table without OF
being present makes no sense.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Link: https://patch.msgid.link/20250722212856.11343-4-rosenp@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>