drm: use drm_compat_ioctl for 32-bit apps

Most of the DRM drivers appear to be missing the .compat_ioctl file
operation entry necessary for 32-bit application compatibility.

This patch  uses drm_compat_ioctl for all drivers which don't have
their own, and which are using drm_ioctl for .unlocked_ioctl.

This leaves drivers/gpu/drm/psb/psb_drv.c unchanged; it has a custom
.unlocked_ioctl and will presumably need a custom .compat_ioctl as
well.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>

drivers/gpu/drm/via/via_drv.c

@@ -65,6 +65,9 @@ static const struct file_operations via_driver_fops = {
 	.mmap = drm_mmap,
 	.poll = drm_poll,
 	.fasync = drm_fasync,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = drm_compat_ioctl,
+#endif
 	.llseek = noop_llseek,
 };