sound: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ice1712/prodigy192.c b/sound/pci/ice1712/prodigy192.c
index 2a8e5cd..e36ddb9 100644
--- a/sound/pci/ice1712/prodigy192.c
+++ b/sound/pci/ice1712/prodigy192.c
@@ -654,7 +654,7 @@
 static void stac9460_proc_regs_read(struct snd_info_entry *entry,
 		struct snd_info_buffer *buffer)
 {
-	struct snd_ice1712 *ice = (struct snd_ice1712 *)entry->private_data;
+	struct snd_ice1712 *ice = entry->private_data;
 	int reg, val;
 	/* registers 0x0 - 0x14 */
 	for (reg = 0; reg <= 0x15; reg++) {