ALSA: hda: Use position_fix=1 for Acer Aspire 5538 to enable capture on internal mic

ALSA: hda: Use position_fix=1 for Acer Aspire 5538 to enable capture on internal mic

commit dd5a089edfa51a74692604b4b427953d8e16bc35 upstream.

BugLink: https://launchpad.net/bugs/685161
The reporter of the bug states that he must use position_fix=1 to enable
capture for the internal microphone, so set it for his machine's PCI
SSID.  Verified using 2.6.35 and the 2010-12-04 alsa-driver build.

Reported-and-tested-by: Ralph Wabel <rwabel@gmx.net>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>