common: Move some CPU functions out of common.h

These functions belong in cpu_func.h since they do not use driver model.
Move them over. Don't bother adding comments since these functions should
be deleted.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/powerpc/cpu/mpc8xxx/fdt.c b/arch/powerpc/cpu/mpc8xxx/fdt.c
index 0d877c4..485c2d4 100644
--- a/arch/powerpc/cpu/mpc8xxx/fdt.c
+++ b/arch/powerpc/cpu/mpc8xxx/fdt.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <cpu_func.h>
 #include <linux/libfdt.h>
 #include <fdt_support.h>
 #include <asm/mp.h>