arm64: defconfig: support Mali CSF-based GPUs

Enable support for Mali CSF-based GPUs, which is found on recent
ARM SoCs, such as Rockchip or Mediatek.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20240326165232.73585-2-sebastian.reichel@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/configs/defconfig

@@ -907,6 +907,7 @@ CONFIG_DRM_MESON=m
 CONFIG_DRM_PL111=m
 CONFIG_DRM_LIMA=m
 CONFIG_DRM_PANFROST=m
+CONFIG_DRM_PANTHOR=m
 CONFIG_DRM_TIDSS=m
 CONFIG_DRM_POWERVR=m
 CONFIG_FB=y