ALSA: hda/realtek - Drop ALC882 asus-a7j and asus-a7m models

These models work fine with the auto-parser with the additional COEF
setup.  The iMac 7,1 (106b:3200) also uses the same quirk, so remove it
too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>