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-socfpga/spl_a10.c b/arch/arm/mach-socfpga/spl_a10.c
index d2f52f2..45aea4a 100644
--- a/arch/arm/mach-socfpga/spl_a10.c
+++ b/arch/arm/mach-socfpga/spl_a10.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <cpu_func.h>
 #include <hang.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/pl310.h>
 #include <asm/u-boot.h>