common: Move some SMP functions out of common.h

These functions belong in cpu_func.h so move them over.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 488358a..769a642 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -13,6 +13,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <cpu_func.h>
 #include <dm.h>
 #include <dm/root.h>
 #include <env.h>