usb/storage/ene_ub6250: Remove redundant NULL check before release_firmware() and pointless assignment

release_firmware() tests for a NULL pointer, so it's redundant to do
that checking before calling it.

Additionally, in ene_load_bincode(), 'sd_fw' is a local variable so
setting it to NULL just before it goes out of scope is completely
pointless, so remove that assignment.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/storage/ene_ub6250.c

@@ -1933,11 +1933,7 @@ static int ene_load_bincode(struct us_data *us, unsigned char flag)
 	kfree(buf);
 
 nofw:
-	if (sd_fw != NULL) {
-		release_firmware(sd_fw);
-		sd_fw = NULL;
-	}
-
+	release_firmware(sd_fw);
 	return result;
 }