[ALSA] Remove zero-initialization of static variables

Removed zero-initializations of static variables.
A tiny optimization.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c
index 9ee07d4..aa21cc7 100644
--- a/sound/pci/bt87x.c
+++ b/sound/pci/bt87x.c
@@ -44,7 +44,7 @@
 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
-static int digital_rate[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 0 }; /* digital input rate */
+static int digital_rate[SNDRV_CARDS];	/* digital input rate */
 static int load_all;	/* allow to load the non-whitelisted cards */
 
 module_param_array(index, int, NULL, 0444);