fbdev: broadsheetfb: fix memory leak

We have requested the firmware and it was loaded but we missed releasing
it both on success and error.

Signed-off-by: Sudip Mukherjee <[e-mail]>
Signed-off-by: Tomi Valkeinen <[e-mail]>

drivers/video/fbdev/broadsheetfb.c

···
 	if ((fw_entry->size < 8*1024) || (fw_entry->size > 64*1024)) {
 		dev_err(dev, "Invalid waveform\n");
 		err = -EINVAL;
-		goto err_failed;
+		goto err_fw;
 	}
 
 	mutex_lock(&(par->io_lock));
···
 	mutex_unlock(&(par->io_lock));
 	if (err < 0) {
 		dev_err(dev, "Failed to store broadsheet waveform\n");
-		goto err_failed;
+		goto err_fw;
 	}
 
 	dev_info(dev, "Stored broadsheet waveform, size %zd\n", fw_entry->size);
 
-	return len;
+	err = len;
 
+err_fw:
+	release_firmware(fw_entry);
 err_failed:
 	return err;
 }