common: Move reset_cpu() to the CPU header

Move this function out of common.h and into a relevant header file.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/cpu_func.h

@@ -83,5 +83,7 @@ enum {
  * @param flags		Flags to control what is done
  */
 int cleanup_before_linux_select(int flags);
+
+void reset_cpu(ulong addr);
 ;
 #endif