ALSA: lola: Deletion of an unnecessary check before the function call "vfree"

The vfree() function performs also input parameter validation. Thus the test
around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/lola/lola_mixer.c

@@ -108,8 +108,7 @@ int lola_init_pins(struct lola *chip, int dir, int *nidp)
 
 void lola_free_mixer(struct lola *chip)
 {
-	if (chip->mixer.array_saved)
-		vfree(chip->mixer.array_saved);
+	vfree(chip->mixer.array_saved);
 }
 
 int lola_init_mixer_widget(struct lola *chip, int nid)