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/ulpi/ulpi-viewport.c b/drivers/usb/ulpi/ulpi-viewport.c
index a2158c9..3bb152b 100644
--- a/drivers/usb/ulpi/ulpi-viewport.c
+++ b/drivers/usb/ulpi/ulpi-viewport.c
@@ -15,6 +15,7 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <linux/delay.h>
 #include <usb/ulpi.h>
 
 /* ULPI viewport control bits */