Move mt76x2 and mt76x2u drivers to mt76x2 subfolder and
leave just shared code in mt76 root folder
Acked-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>