dm: Use parenthesis for the device_get_ops macro argument

Use parenthesis for the device_get_ops macro argument. This prevents
errors when using an expression for the parameter.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/device.h b/include/dm/device.h
index 435a111..cb52a09 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -212,7 +212,7 @@
 #define DM_MAX_SEQ_STR	3
 
 /* Returns the operations for a device */
-#define device_get_ops(dev)	(dev->driver->ops)
+#define device_get_ops(dev)	((dev)->driver->ops)
 
 #if CONFIG_IS_ENABLED(OF_PLATDATA_RT)
 u32 dev_get_flags(const struct udevice *dev);