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/mpc86xx/cpu.c b/arch/powerpc/cpu/mpc86xx/cpu.c
index 1c3c782..bb14444 100644
--- a/arch/powerpc/cpu/mpc86xx/cpu.c
+++ b/arch/powerpc/cpu/mpc86xx/cpu.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <cpu_func.h>
 #include <vsprintf.h>
 #include <watchdog.h>
 #include <command.h>