ALSA: hdsp: Deletion of an unnecessary check before the function call "release_firmware"

The release_firmware() function tests whether its argument is NULL and then
return immediately. Thus the test around the call is not needed.

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

sound/pci/rme9652/hdsp.c

@@ -5307,8 +5307,7 @@ static int snd_hdsp_free(struct hdsp *hdsp)
 
 	snd_hdsp_free_buffers(hdsp);
 
-	if (hdsp->firmware)
-		release_firmware(hdsp->firmware);
+	release_firmware(hdsp->firmware);
 	vfree(hdsp->fw_uploaded);
 
 	if (hdsp->iobase)