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-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index 70fef3b..c6ecd5b 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -8,6 +8,7 @@
 #include <debug_uart.h>
 #include <fdtdec.h>
 #include <hang.h>
+#include <init.h>
 #include <spl.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>