ALSA: hda - Define a fallback_pin_fixup_tbl for alc269 family

We have another Dell laptop which needs the DELL4_MIC_NO_PRESENCE,
and this laptop has different pincfg definitions from existing
ones in the pintbl, rather adding a new entry, let us define
a tbl in the fallback_pin_fixup_tbl and this tbl will match
all dell machines with alc289 codec and the pins of 0x19 and 0x1b
are undef by default.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>