common: Drop init.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>

board/intel/cougarcanyon2/cougarcanyon2.c

@@ -6,6 +6,7 @@
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
+#include <init.h>
 #include <pci.h>
 #include <smsc_sio1007.h>
 #include <asm/ibmpc.h>

board/intel/crownbay/crownbay.c

@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <asm/ibmpc.h>
 #include <asm/pnp_def.h>
 #include <smsc_lpc47m.h>

board/intel/minnowmax/minnowmax.c

@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <init.h>
 #include <asm/gpio.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>