libpayload/drivers/usb/ohci_private.h: Add parentheses around macro

Change-Id: Ib90564e32f5ff204aa5d856024b7eed2624a77b7
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/20456
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/payloads/libpayload/drivers/usb/ohci_private.h b/payloads/libpayload/drivers/usb/ohci_private.h
index 116a2b4..f8d0217 100644
--- a/payloads/libpayload/drivers/usb/ohci_private.h
+++ b/payloads/libpayload/drivers/usb/ohci_private.h
@@ -236,7 +236,7 @@
 #define TD_DIRECTION_MASK MASK(TD_DIRECTION_SHIFT, 2)
 #define TD_DIRECTION_SETUP (OHCI_SETUP << TD_DIRECTION_SHIFT)
 #define TD_DIRECTION_IN (OHCI_IN << TD_DIRECTION_SHIFT)
-#define TD_DIRECTION_OUT OHCI_OUT << TD_DIRECTION_SHIFT
+#define TD_DIRECTION_OUT (OHCI_OUT << TD_DIRECTION_SHIFT)
 #define TD_DELAY_INTERRUPT_SHIFT	21
 #define TD_DELAY_INTERRUPT_MASK		MASK(TD_DELAY_INTERRUPT_SHIFT, 3)
 #define TD_DELAY_INTERRUPT_ZERO		0