Fix the mic input of HP dv6736 with Conexant 5051 codec chip.
This laptop seems have no mic-switching per jack connection.
A new model hp-dv6736 is introduced to match with the h/w implementation.

Reference: Novell bnc#480753
	https://bugzilla.novell.com/show_bug.cgi?id=480753Signed-off-by: Takashi Iwai <tiwai@suse.de>