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/x86/cpu/apollolake/fsp_s.c b/arch/x86/cpu/apollolake/fsp_s.c
index fd6e73d..30b820f 100644
--- a/arch/x86/cpu/apollolake/fsp_s.c
+++ b/arch/x86/cpu/apollolake/fsp_s.c
@@ -8,6 +8,7 @@
 #include <binman.h>
 #include <bootstage.h>
 #include <dm.h>
+#include <init.h>
 #include <irq.h>
 #include <malloc.h>
 #include <acpi/acpi_s3.h>