ALSA: intel8x0: Fix missing check in snd_intel8x0m_create

When device_type == DEVICE_ALI, we should also check the return
value of pci_iomap() to avoid potential null pointer dereference.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20210131100916.7915-1-dinghao.liu@zju.edu.cnSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/intel8x0m.c

@@ -1129,13 +1129,14 @@ static int snd_intel8x0m_create(struct snd_card *card,
 		chip->bmaddr = pci_iomap(pci, 3, 0);
 	else
 		chip->bmaddr = pci_iomap(pci, 1, 0);
+
+port_inited:
 	if (!chip->bmaddr) {
 		dev_err(card->dev, "Controller space ioremap problem\n");
 		snd_intel8x0m_free(chip);
 		return -EIO;
 	}
 
- port_inited:
 	/* initialize offsets */
 	chip->bdbars_count = 2;
 	tbl = intel_regs;