ALSA: ymfpci: Use common error handling code in snd_ymfpci_create()

* Add a jump target so that a bit of exception handling can be better
  reused at the end of this function.

  This issue was detected by using the Coccinelle software.

* The script "checkpatch.pl" pointed information out like the following.

  ERROR: do not use assignment in if condition

  Thus fix a few source code places.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ymfpci/ymfpci_main.c

@@ -2399,59 +2399,60 @@ int snd_ymfpci_create(struct snd_card *card,
 		dev_err(chip->card->dev,
 			"unable to grab memory region 0x%lx-0x%lx\n",
 			chip->reg_area_phys, chip->reg_area_phys + 0x8000 - 1);
-		snd_ymfpci_free(chip);
-		return -EBUSY;
+		err = -EBUSY;
+		goto free_chip;
 	}
 	if (request_irq(pci->irq, snd_ymfpci_interrupt, IRQF_SHARED,
 			KBUILD_MODNAME, chip)) {
 		dev_err(chip->card->dev, "unable to grab IRQ %d\n", pci->irq);
-		snd_ymfpci_free(chip);
-		return -EBUSY;
+		err = -EBUSY;
+		goto free_chip;
 	}
 	chip->irq = pci->irq;
 
 	snd_ymfpci_aclink_reset(pci);
 	if (snd_ymfpci_codec_ready(chip, 0) < 0) {
-		snd_ymfpci_free(chip);
-		return -EIO;
+		err = -EIO;
+		goto free_chip;
 	}
 
 	err = snd_ymfpci_request_firmware(chip);
 	if (err < 0) {
 		dev_err(chip->card->dev, "firmware request failed: %d\n", err);
-		snd_ymfpci_free(chip);
-		return err;
+		goto free_chip;
 	}
 	snd_ymfpci_download_image(chip);
 
 	udelay(100); /* seems we need a delay after downloading image.. */
 
 	if (snd_ymfpci_memalloc(chip) < 0) {
-		snd_ymfpci_free(chip);
-		return -EIO;
+		err = -EIO;
+		goto free_chip;
 	}
 
-	if ((err = snd_ymfpci_ac3_init(chip)) < 0) {
-		snd_ymfpci_free(chip);
-		return err;
-	}
+	err = snd_ymfpci_ac3_init(chip);
+	if (err < 0)
+		goto free_chip;
 
 #ifdef CONFIG_PM_SLEEP
 	chip->saved_regs = kmalloc(YDSXGR_NUM_SAVED_REGS * sizeof(u32),
 				   GFP_KERNEL);
 	if (chip->saved_regs == NULL) {
-		snd_ymfpci_free(chip);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto free_chip;
 	}
 #endif
 
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
-		snd_ymfpci_free(chip);
-		return err;
-	}
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0)
+		goto free_chip;
 
 	snd_ymfpci_proc_init(card, chip);
 
 	*rchip = chip;
 	return 0;
+
+free_chip:
+	snd_ymfpci_free(chip);
+	return err;
 }