ALSA: vx_core: Drop unused dev field

The vx_core.dev field has never been set but referred incorrectly at
firmware loading.  Pass the proper device pointer from card->dev at
request_firmware(), and drop the unused dev field from vx_core, too.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20240807133452.9424-11-tiwai@suse.de

include/sound/vx_core.h

@@ -155,7 +155,6 @@ struct vx_core {
 	unsigned int chip_status;
 	unsigned int pcm_running;
 
-	struct device *dev;
 	struct snd_hwdep *hwdep;
 
 	struct vx_rmh irq_rmh;	/* RMH used in interrupts */

sound/drivers/vx/vx_hwdep.c

@@ -58,7 +58,7 @@ int snd_vx_setup_firmware(struct vx_core *chip)
 		if (! fw_files[chip->type][i])
 			continue;
 		sprintf(path, "vx/%s", fw_files[chip->type][i]);
-		if (request_firmware(&fw, path, chip->dev)) {
+		if (request_firmware(&fw, path, chip->card->dev)) {
 			snd_printk(KERN_ERR "vx: can't load firmware %s\n", path);
 			return -ENOENT;
 		}