clk: mvebu: use SPDX-License-Identifier

Convert the remaining files to SPDX license description.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mvebu/common.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Marvell EBU SoC common clock handling
  *
@@ -7,9 +8,6 @@
  * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
  * Andrew Lunn <andrew@lunn.ch>
  *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #include <linux/kernel.h>