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/board/atmel/at91sam9260ek/led.c b/board/atmel/at91sam9260ek/led.c
index 2ea66b9..cc6d5d7 100644
--- a/board/atmel/at91sam9260ek/led.c
+++ b/board/atmel/at91sam9260ek/led.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/arch/gpio.h>
 #include <status_led.h>