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/arch/arm/mach-rockchip/rk3036/rk3036.c b/arch/arm/mach-rockchip/rk3036/rk3036.c
index e0a6e4b..e9e020f 100644
--- a/arch/arm/mach-rockchip/rk3036/rk3036.c
+++ b/arch/arm/mach-rockchip/rk3036/rk3036.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/arch-rockchip/grf_rk3036.h>
 #include <asm/arch-rockchip/hardware.h>
diff --git a/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c b/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c
index c39cbb8..3874716 100644
--- a/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c
+++ b/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c
@@ -3,6 +3,7 @@
  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
  */
 #include <common.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/types.h>
 #include <asm/arch-rockchip/cru_rk3036.h>