ALSA: ca0106: Constify snd_ca0106_details

The snd_ca0106_details table entries are referred only as read-only.
Let's make them const.

There should be no functional changes by this patch.

Link: https://lore.kernel.org/r/20200103081714.9560-48-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ca0106/ca0106.h

@@ -663,7 +663,7 @@ struct snd_ca0106_details {
 // definition of the chip-specific record
 struct snd_ca0106 {
 	struct snd_card *card;
-	struct snd_ca0106_details *details;
+	const struct snd_ca0106_details *details;
 	struct pci_dev *pci;
 
 	unsigned long port;

sound/pci/ca0106/ca0106_main.c

@@ -156,7 +156,7 @@ MODULE_PARM_DESC(subsystem, "Force card subsystem model.");
 
 #include "ca0106.h"
 
-static struct snd_ca0106_details ca0106_chip_details[] = {
+static const struct snd_ca0106_details ca0106_chip_details[] = {
 	 /* Sound Blaster X-Fi Extreme Audio. This does not have an AC97. 53SB079000000 */
 	 /* It is really just a normal SB Live 24bit. */
 	 /* Tested:
@@ -503,7 +503,7 @@ static void restore_spdif_bits(struct snd_ca0106 *chip, int idx)
 }
 
 static int snd_ca0106_channel_dac(struct snd_ca0106 *chip,
-				  struct snd_ca0106_details *details,
+				  const struct snd_ca0106_details *details,
 				  int channel_id)
 {
 	switch (channel_id) {
@@ -1593,7 +1593,7 @@ static int snd_ca0106_create(int dev, struct snd_card *card,
 					 struct snd_ca0106 **rchip)
 {
 	struct snd_ca0106 *chip;
-	struct snd_ca0106_details *c;
+	const struct snd_ca0106_details *c;
 	int err;
 	static const struct snd_device_ops ops = {
 		.dev_free = snd_ca0106_dev_free,

sound/pci/ca0106/ca0106_mixer.c

@@ -654,7 +654,7 @@ static const int spi_dmute_bit[] = {
 };
 
 static struct snd_kcontrol_new
-snd_ca0106_volume_spi_dac_ctl(struct snd_ca0106_details *details,
+snd_ca0106_volume_spi_dac_ctl(const struct snd_ca0106_details *details,
 			      int channel_id)
 {
 	struct snd_kcontrol_new spi_switch = {0};