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/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index 32bf927..eaa5dcb 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -27,6 +27,7 @@
 #include <dm/device_compat.h>
 #include <dm/devres.h>
 #include <linux/bug.h>
+#include <linux/delay.h>
 
 #include <linux/errno.h>
 #include <linux/list.h>