common: Move checkcpu() out of common.h

This function belongs in cpu_func.h so move it over.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

common/board_f.c

@@ -13,6 +13,7 @@
 #include <bloblist.h>
 #include <console.h>
 #include <cpu.h>
+#include <cpu_func.h>
 #include <dm.h>
 #include <env.h>
 #include <env_internal.h>