drm-uapi: Sync nouveau_drm.h

From https://cgit.freedesktop.org/drm/

    commit 72fa02fdf83306c52bc1eede28359e3fa32a151a
    Author: Dave Airlie <airlied@redhat.com>
    Date:   Wed Jan 24 14:24:25 2024 +1000

        nouveau: add an ioctl to report vram usage

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27662>

include/drm-uapi/nouveau_drm.h

@@ -54,6 +54,20 @@ extern "C" {
  */
 #define NOUVEAU_GETPARAM_EXEC_PUSH_MAX   17
 
+/*
+ * NOUVEAU_GETPARAM_VRAM_BAR_SIZE - query bar size
+ *
+ * Query the VRAM BAR size.
+ */
+#define NOUVEAU_GETPARAM_VRAM_BAR_SIZE 18
+
+/*
+ * NOUVEAU_GETPARAM_VRAM_USED
+ *
+ * Get remaining VRAM size.
+ */
+#define NOUVEAU_GETPARAM_VRAM_USED 19
+
 struct drm_nouveau_getparam {
 	__u64 param;
 	__u64 value;