ALSA: hda - Rearrange for dropping static quirk codes in Coexant driver

Just shuffle the codes and add ifdefs for testing to drop the static
quirk codes from patch_conexant.c.

By commenting out ENABLE_CXT_STATIC_QUIRKS define at the beginning of
the file, you can disable the whole static codes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>