ALSA: hda - Fix init verbs of AD1884A mobile model

The current ad1884a-mobile model has a problem that the speaker output
doesn't work sometimes after boot or power-saving on some HP laptops.
It seems that the verbs accessing to the non-functional widgets cause
this problem.

This patch simplifies the init verbs for mobile model not to touch
unnecessary setups so that it avoids the speaker-mute problem.

Reference: Novell bnc#495668
	https://bugzilla.novell.com/show_bug.cgi?id=495668

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