ARMv7: straighten out reset code

We don't need three different implementations.

Change-Id: Ie7b5fa90794676ea38838454a33e8e9188428eb7
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2406
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/samsung/exynos5-common/reset.c

@@ -21,10 +21,10 @@
  * MA 02111-1307 USA
  */
 
-#include <common.h>
+#include <reset.h>
 #include <arch/io.h>
 
-void reset_cpu(unsigned long addr)
+void soft_reset(void)
 {
 	writel(0x1, samsung_get_base_swreset());
 }