ALSA: hda - Make common input-jack helper functions

Since multiple codec drivers already use the input-jack stuff, let's
make common helper functions to reduce the duplicated codes.

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

diff --cc sound/pci/hda/hda_codec.c
Simple merge

diff --cc sound/pci/hda/hda_codec.h
Simple merge

diff --cc sound/pci/hda/hda_local.h
Simple merge

diff --cc sound/pci/hda/patch_conexant.c
Simple merge

diff --cc sound/pci/hda/patch_realtek.c
Simple merge

diff --cc sound/pci/hda/patch_sigmatel.c
Simple merge