common: Move ARM cache operations out of common.h

These functions are CPU-related and do not use driver model. Move them to
cpu_func.h

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/post/cpu/mpc83xx/ecc.c b/post/cpu/mpc83xx/ecc.c
index 65a490d..16210c6 100644
--- a/post/cpu/mpc83xx/ecc.c
+++ b/post/cpu/mpc83xx/ecc.c
@@ -10,6 +10,7 @@
 
 #include <common.h>
 #include <cpu_func.h>
+#include <irq_func.h>
 #include <mpc83xx.h>
 #include <watchdog.h>
 #include <asm/io.h>