ALSA: HDA: Remove redundant LPIB quirks for ATI chipset

Now that we have changed the position_fix default for ATI and AMD
to be LPIB (see commit 50e3bbf9), we can remove the quirks that
were added for ATI chipsets.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>