1. Add more ASUS NB model.
2. Fixed alc663_m51va_setup
   M51VA has Digital Mic that NID is 0x12. The record source index is
   0x9 for ALC663.
   So, to modify the alc663_m51va_setup function to index 0x9
   and add analog Mic aupport function alc663_mode1_setup.
3. Add ASUS mode7 and mode8 modules for ALC663
Signed-off-by: Kailang Yang <kailang@realtek.com.tw>
Signed-off-by: Takashi Iwai <tiwai@suse.de>