etnaviv: Use kms fd to hash lookup the pipe screen

of gpu_fd and kms_fd but since we only have a single GPU
that will do atm.
Signed-off-by: Guido Günther <agx@sigxcpu.org>

src/gallium/winsys/etnaviv/drm/etnaviv_drm_winsys.c

@@ -104,7 +104,7 @@ etna_drm_screen_create_renderonly(struct renderonly *ro)
          goto unlock;
    }
 
-   pscreen = util_hash_table_get(etna_tab, intptr_to_pointer(ro->gpu_fd));
+   pscreen = util_hash_table_get(etna_tab, intptr_to_pointer(ro->kms_fd));
    if (pscreen) {
       etna_screen(pscreen)->refcnt++;
    } else {