common: fsl: Fix broken SPDX-License-Identifier change

This bug was introduced by:
"Add GPL-2.0+ SPDX-License-Identifier to source files"
(sha1: 1a4596601f)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

common/cmd_mfsl.c

@@ -1,7 +1,7 @@
-ve received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * who contributed to this
- * project.
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal  SIMEK <monstr@monstr.eu>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */