[ALSA] emu10k1: Add module option uint subsystem.

EMU10K1/EMU10K2 driver
It allows the user to force the snd-emu10k1 module to think the user
has a particular sound card. Useful if their particular sound card
is not yet recognised.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index c50b919..c2ef3f0 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1167,6 +1167,7 @@
 		       unsigned short extout_mask,
 		       long max_cache_bytes,
 		       int enable_ir,
+		       uint subsystem,
 		       emu10k1_t ** remu);
 
 int snd_emu10k1_pcm(emu10k1_t * emu, int device, snd_pcm_t ** rpcm);