ALSA: usb-audio: don't log messages meant for 1810c when initializing 1824c

The log messages for the PreSonus STUDIO 1810c about
device_setup are not applicable to the 1824c, and should
not be logged when 1824c initializes.

Refactor from if statement to switch statement as there
might be more STUDIO series devices added later.

Fixes: 080564558eb1 ("ALSA: usb-audio: enable support for Presonus Studio 1824c within 1810c file")
Signed-off-by: Roy Vegard Ovesen <[e-mail]>
Link: https://patch.msgid.link/aPaYTP7ceuABf8c7@ark
Signed-off-by: Takashi Iwai <[e-mail]>

sound/usb/mixer_s1810c.c

···
 	if (!list_empty(&chip->mixer_list))
 		return 0;
 
-	dev_info(&dev->dev,
-		 "Presonus Studio 1810c, device_setup: %u\n", chip->setup);
-	if (chip->setup == 1)
-		dev_info(&dev->dev, "(8out/18in @ 48kHz)\n");
-	else if (chip->setup == 2)
-		dev_info(&dev->dev, "(6out/8in @ 192kHz)\n");
-	else
-		dev_info(&dev->dev, "(8out/14in @ 96kHz)\n");
-
 	ret = snd_s1810c_init_mixer_maps(chip);
 	if (ret < 0)
 		return ret;
···
 	if (ret < 0)
 		return ret;
 
-	// The 1824c has a Mono Main switch instead of a
-	// A/B select switch.
-	if (mixer->chip->usb_id == USB_ID(0x194f, 0x010d)) {
-		ret = snd_s1810c_switch_init(mixer, &snd_s1824c_mono_sw);
-		if (ret < 0)
-			return ret;
-	} else if (mixer->chip->usb_id == USB_ID(0x194f, 0x010c)) {
+	switch (chip->usb_id) {
+	case USB_ID(0x194f, 0x010c): /* Presonus Studio 1810c */
+		dev_info(&dev->dev,
+			 "Presonus Studio 1810c, device_setup: %u\n", chip->setup);
+		if (chip->setup == 1)
+			dev_info(&dev->dev, "(8out/18in @ 48kHz)\n");
+		else if (chip->setup == 2)
+			dev_info(&dev->dev, "(6out/8in @ 192kHz)\n");
+		else
+			dev_info(&dev->dev, "(8out/14in @ 96kHz)\n");
+
 		ret = snd_s1810c_switch_init(mixer, &snd_s1810c_ab_sw);
 		if (ret < 0)
 			return ret;
+
+		break;
+	case USB_ID(0x194f, 0x010d): /* Presonus Studio 1824c */
+		ret = snd_s1810c_switch_init(mixer, &snd_s1824c_mono_sw);
+		if (ret < 0)
+			return ret;
+
+		break;
 	}
 
 	return ret;