common: Drop init.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/sbc8349/sbc8349.c b/board/sbc8349/sbc8349.c
index 9051392..2c05ebb 100644
--- a/board/sbc8349/sbc8349.c
+++ b/board/sbc8349/sbc8349.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <fdt_support.h>
+#include <init.h>
 #include <ioports.h>
 #include <mpc83xx.h>
 #include <asm/mpc8349_pci.h>