[ALSA] Add snd_card_set_generic_dev() call

ARM,SA11xx UDA1341 driver,Generic drivers,MPU401 UART,MIPS
MIPS AU1x00 driver,PPC,PPC PowerMac driver,SPARC,SPARC AMD7930 driver
SPARC cs4231 driver,SPARC DBRI driver
- Added snd_card_set_generic_dev() call.
- Added SND_GENERIC_DRIVER to Kconfig.
- Clean up the error path in probe if necessary.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/virmidi.c b/sound/drivers/virmidi.c
index 5937711..af12185 100644
--- a/sound/drivers/virmidi.c
+++ b/sound/drivers/virmidi.c
@@ -116,6 +116,10 @@
 	strcpy(card->driver, "VirMIDI");
 	strcpy(card->shortname, "VirMIDI");
 	sprintf(card->longname, "Virtual MIDI Card %i", dev + 1);
+
+	if ((err = snd_card_set_generic_dev(card)) < 0)
+		goto __nodev;
+
 	if ((err = snd_card_register(card)) == 0) {
 		snd_virmidi_cards[dev] = card;
 		return 0;