switch compat_drm_version() to drm_ioctl_kernel()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 1ead19c..c6cba98 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -461,7 +461,7 @@ static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
  *
  * Fills in the version information in \p arg.
  */
-static int drm_version(struct drm_device *dev, void *data,
+int drm_version(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv)
 {
 	struct drm_version *version = data;