freedreno/fdperf: prefer render node

Avoid inadvertantly becoming master if fdperf happens to be the first
thing to open the device.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5762>

src/freedreno/perfcntrs/fdperf.c

@@ -295,7 +295,7 @@ find_device(void)
 	if (!dev.dtnode)
 		errx(1, "could not find qcom,adreno-3xx node");
 
-	fd = drmOpen("msm", NULL);
+	fd = drmOpenWithType("msm", NULL, DRM_NODE_RENDER);
 	if (fd < 0)
 		err(1, "could not open drm device");