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>

common/bootm_os.c

@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <bootm.h>
+#include <cpu_func.h>
 #include <env.h>
 #include <fdt_support.h>
 #include <linux/libfdt.h>

common/kgdb_stubs.c

@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <cpu_func.h>
 #include <kgdb.h>
 #include <serial.h>
 

common/spl/spl_atf.c

@@ -11,6 +11,7 @@
 
 #include <common.h>
 #include <atf_common.h>
+#include <cpu_func.h>
 #include <errno.h>
 #include <spl.h>