UPSTREAM: drm: Fix 32-bit drmSyncobjWait.

Otherwise we get an EFAULT, at least on a 64-bit kernel.

Fixes: 2048a9e7 "drm: add drmSyncobjWait wrapper"
Reviewed-by: Christian Knig <christian.koenig@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit b1e63d9ee622f3f08127bab43bf6817101b870a8)

BUG=b:67506532
TEST=run simple vulkan application on kahlee, see no errors with
     adb logcat.

Change-Id: Ib87490c87455c6bb05fae6f6457eec6f70be7e2d
Reviewed-on: https://chromium-review.googlesource.com/906429
Commit-Ready: Bas Nieuwenhuizen <basni@chromium.org>
Tested-by: Bas Nieuwenhuizen <basni@chromium.org>
Reviewed-by: Dominik Behr <dbehr@chromium.org>
diff --git a/xf86drm.c b/xf86drm.c
index 74b4e23..1e87610 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -4271,7 +4271,7 @@
     int ret;
 
     memclear(args);
-    args.handles = (intptr_t)handles;
+    args.handles = (uintptr_t)handles;
     args.timeout_nsec = timeout_nsec;
     args.count_handles = num_handles;
     args.flags = flags;