common: Move ARM cache operations out of common.h

These functions are CPU-related and do not use driver model. Move them to
cpu_func.h

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

cmd/load.c

@@ -10,6 +10,7 @@
 #include <common.h>
 #include <command.h>
 #include <console.h>
+#include <cpu_func.h>
 #include <env.h>
 #include <s_record.h>
 #include <net.h>