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/broadwell/cpu_from_spl.c b/arch/x86/cpu/broadwell/cpu_from_spl.c
index 2aa6f24..17ff43b 100644
--- a/arch/x86/cpu/broadwell/cpu_from_spl.c
+++ b/arch/x86/cpu/broadwell/cpu_from_spl.c
@@ -9,6 +9,7 @@
 #include <cpu_func.h>
 #include <debug_uart.h>
 #include <handoff.h>
+#include <init.h>
 #include <asm/mtrr.h>
 
 int misc_init_r(void)