common: Move some cache and MMU functions out of common.h

These functions belong in cpu_func.h. Another option would be cache.h
but that code uses driver model and we have not moved these cache
functions to use driver model. Since they are CPU-related it seems
reasonable to put them here.

Move them over.

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

cmd/cache.c

@@ -9,6 +9,7 @@
  */
 #include <common.h>
 #include <command.h>
+#include <cpu_func.h>
 #include <linux/compiler.h>
 
 static int parse_argv(const char *);