[ALSA] sound: fix ad1889 section mismatch

Fix section mismatch in ad1889 by renaming the pci_driver variable to a
whitelisted variable name.
WARNING: vmlinux.o(.data+0x2e5ff0): Section mismatch: reference to .init.text:snd_ad1889_probe (between 'ad1889_pci' and 'index')

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/ad1889.c

@@ -1054,7 +1054,7 @@ static struct pci_device_id snd_ad1889_ids[] = {
 };
 MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
 
-static struct pci_driver ad1889_pci = {
+static struct pci_driver ad1889_pci_driver = {
 	.name = "AD1889 Audio",
 	.id_table = snd_ad1889_ids,
 	.probe = snd_ad1889_probe,
@@ -1064,13 +1064,13 @@ static struct pci_driver ad1889_pci = {
 static int __init
 alsa_ad1889_init(void)
 {
-	return pci_register_driver(&ad1889_pci);
+	return pci_register_driver(&ad1889_pci_driver);
 }
 
 static void __exit
 alsa_ad1889_fini(void)
 {
-	pci_unregister_driver(&ad1889_pci);
+	pci_unregister_driver(&ad1889_pci_driver);
 }
 
 module_init(alsa_ad1889_init);