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/arch/xtensa/lib/time.c b/arch/xtensa/lib/time.c
index 62bbe37..3a02c38 100644
--- a/arch/xtensa/lib/time.c
+++ b/arch/xtensa/lib/time.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <time.h>
 #include <asm/global_data.h>
+#include <linux/delay.h>
 #include <linux/stringify.h>
 
 DECLARE_GLOBAL_DATA_PTR;