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/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 75d24ae..ac6c5b5 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -13,6 +13,7 @@
 #include <pci.h>
 #include <usb.h>
 #include <asm/io.h>
+#include <linux/delay.h>
 #include <usb/ehci-ci.h>
 #include <hwconfig.h>
 #include <fsl_usb.h>