ALSA: Fix invalid kerneldoc markers

They are no real kerneldoc comments, so drop such markers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/emu10k1/emu10k1x.c b/sound/pci/emu10k1/emu10k1x.c
index e223de1..15933f9 100644
--- a/sound/pci/emu10k1/emu10k1x.c
+++ b/sound/pci/emu10k1/emu10k1x.c
@@ -180,7 +180,7 @@
 
 /* From 0x50 - 0x5f, last samples captured */
 
-/**
+/*
  * The hardware has 3 channels for playback and 1 for capture.
  *  - channel 0 is the front channel
  *  - channel 1 is the rear channel