[ALSA] Fix invalid assignment of PCI revision

Fix the type of PCI revision to char from int and avoid invalid
assignment with pointer cast.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 16be1f3..843dcca 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -2291,7 +2291,7 @@
 	chip->pci = pci;
 	chip->irq = -1;
 	chip->device_id = pci->device;
-	pci_read_config_byte(pci, PCI_REVISION_ID, (u8 *)&chip->rev);
+	pci_read_config_byte(pci, PCI_REVISION_ID, &chip->rev);
 	chip->reg_area_phys = pci_resource_start(pci, 0);
 	chip->reg_area_virt = ioremap_nocache(chip->reg_area_phys, 0x8000);
 	pci_set_master(pci);