drm/vmwgfx: Stop checking minor type directly

Use the appropriate drm minor type helper instead.

Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Frank Binns <frank.binns@imgtec.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466788520-21325-2-git-send-email-frank.binns@imgtec.com

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -1041,8 +1041,7 @@ static struct vmw_master *vmw_master_check(struct drm_device *dev,
 	struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 	struct vmw_master *vmaster;
 
-	if (file_priv->minor->type != DRM_MINOR_LEGACY ||
-	    !(flags & DRM_AUTH))
+	if (!drm_is_primary_client(file_priv) || !(flags & DRM_AUTH))
 		return NULL;
 
 	ret = mutex_lock_interruptible(&dev->master_mutex);