[ALSA] Enable capture from line-in and CD on Revolution 5.1

Enable capture from line-in and CD on the Revolution 5.1 card.
This patch adds support for switching between the 5 input channels of
the AK5365 ADC and modifies the Revolution 5.1 driver to make use of
this facility.  Previously the capture channel was fixed to channel 0
(microphone on the Revolution 5.1 card).

Signed-off-by: Jochen Voss <voss@seehuhn.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/include/sound/ak4xxx-adda.h b/include/sound/ak4xxx-adda.h
index d0deca6..d01d535 100644
--- a/include/sound/ak4xxx-adda.h
+++ b/include/sound/ak4xxx-adda.h
@@ -50,6 +50,8 @@
 	char *name;		/* capture gain volume label */
 	char *switch_name;	/* capture switch */
 	unsigned int num_channels;
+	char *selector_name;	/* capture source select label */
+	const char **input_names; /* capture source names (NULL terminated) */
 };
 
 struct snd_akm4xxx {