ALSA: Reduce boilerplate for new jack types

Use a lookup table rather than explicit code to map input subsystem jack
types into ASoC ones, implemented as suggested by Takashi Iwai.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/jack.h

@@ -30,6 +30,9 @@ struct input_dev;
 /**
  * Jack types which can be reported.  These values are used as a
  * bitmask.
+ *
+ * Note that this must be kept in sync with the lookup table in
+ * sound/core/jack.c.
  */
 enum snd_jack_types {
 	SND_JACK_HEADPHONE	= 0x0001,