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/liebherr/display5/display5.c b/board/liebherr/display5/display5.c
index a362d25..b979ddd 100644
--- a/board/liebherr/display5/display5.c
+++ b/board/liebherr/display5/display5.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <dm.h>
 #include <fdt_support.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx-regs.h>