MAINTAINERS: update nouveau maintainers

Since I will continue to work on Nouveau consistently, also beyond my
former and still ongoing VM_BIND/EXEC work, add myself to the list of
Nouveau maintainers.

Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230926014913.7721-1-dakr@redhat.com

Author: dakr

MAINTAINERS

@@ -6647,6 +6647,7 @@ F:	drivers/gpu/drm/panel/panel-novatek-nt36672a.c
 DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS
 M:	Karol Herbst <kherbst@redhat.com>
 M:	Lyude Paul <lyude@redhat.com>
+M:	Danilo Krummrich <dakr@redhat.com>
 L:	dri-devel@lists.freedesktop.org
 L:	nouveau@lists.freedesktop.org
 S:	Supported