TW68-core: check return values for errors
gs2971: cleanup
tc358743_h2c: turn off annoying messages when input not attached
gs2971: release ecspi2 cs after transaction
board-mx6_per: gs2971 is cs0, wm5192 is cs1, so swap to reduce confusion
adv7180: change i2c errors to dev_err instead of dev_dbg
adv7180: move global video_idx to structure
board-mx6_per: disable gigabit