common: Drop linux/delay.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/compulab/common/common.c b/board/compulab/common/common.c
index 2f92c65..528c97d 100644
--- a/board/compulab/common/common.c
+++ b/board/compulab/common/common.c
@@ -10,6 +10,7 @@
 #include <asm/bootm.h>
 #include <asm/gpio.h>
 #include <asm/setup.h>
+#include <linux/delay.h>
 
 #include "common.h"
 #include "eeprom.h"