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/cmd/misc.c b/cmd/misc.c
index d332193..20ab943 100644
--- a/cmd/misc.c
+++ b/cmd/misc.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <command.h>
 #include <console.h>
+#include <linux/delay.h>
 
 static int do_sleep(struct cmd_tbl *cmdtp, int flag, int argc,
 		    char *const argv[])