sound: OSS: Remove superfluous pci_set_dvdata(pci, NULL)

Only kahlua.c has it.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/oss/kahlua.c b/sound/oss/kahlua.c
index 2a44cc1..12be1fb 100644
--- a/sound/oss/kahlua.c
+++ b/sound/oss/kahlua.c
@@ -178,7 +178,6 @@
 	return 0;
 
 err_out_free:
-	pci_set_drvdata(pdev, NULL);
 	kfree(hw_config);
 	return 1;
 }
@@ -187,7 +186,6 @@
 {
 	struct address_info *hw_config = pci_get_drvdata(pdev);
 	sb_dsp_unload(hw_config, 0);
-	pci_set_drvdata(pdev, NULL);
 	kfree(hw_config);
 }