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-board-spl.c b/arch/arm/mach-rockchip/rk3036-board-spl.c
index fbc89b6..6eb89e1 100644
--- a/arch/arm/mach-rockchip/rk3036-board-spl.c
+++ b/arch/arm/mach-rockchip/rk3036-board-spl.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <debug_uart.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/arch-rockchip/bootrom.h>
 #include <asm/arch-rockchip/sdram_rk3036.h>