Add a quirk facility for AC97 in OSS, and add a quirk list for the
i810_audio driver.

This allows automatically "correct" behaviour for sound hardware w/ known
oddities.  For example, many cards have the headphone and line-out outputs
swapped or headphone outputs only.

The code is stolen shamelessly from ALSA, FWIW...
Signed-off-by: John W. Linville <linville@tuxdriver.com>

From: William Lee Irwin III <wli@holomorphy.com>

include/linux/ac97_codec.h:337: warning: `struct pci_dev' declared inside parameter list
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>