[ALSA] ice1724: fix MIDI

The VT1724 MIDI port is not MPU-401 compatible; remove the hacks that
try to make the MPU-401 library work with it, and just use some simple
device-specific code.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Tested-by: Pavel Hofman <pavel.hofman@insite.cz>
diff --git a/sound/pci/ice1712/ice1712.h b/sound/pci/ice1712/ice1712.h
index 3208901..762fbd7 100644
--- a/sound/pci/ice1712/ice1712.h
+++ b/sound/pci/ice1712/ice1712.h
@@ -333,6 +333,8 @@
 	unsigned int has_spdif: 1;	/* VT1720/4 - has SPDIF I/O */
 	unsigned int force_pdma4: 1;	/* VT1720/4 - PDMA4 as non-spdif */
 	unsigned int force_rdma1: 1;	/* VT1720/4 - RDMA1 as non-spdif */
+	unsigned int midi_output: 1;	/* VT1720/4: MIDI output triggered */
+	unsigned int midi_input: 1;	/* VT1720/4: MIDI input triggered */
 	unsigned int num_total_dacs;	/* total DACs */
 	unsigned int num_total_adcs;	/* total ADCs */
 	unsigned int cur_rate;		/* current rate */