sync ar5008_bb_load_noisefloor() with ar9003_bb_load_noisefloor(). we must not restore the noisefloor values if load failed on AR5008 family too.
sync ar5008_bb_load_noisefloor() with ar9003_bb_load_noisefloor().
we must not restore the noisefloor values if load failed on AR5008
family too.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars