arm64: dts: rockchip: enable gpu on Qnap-TS433

arm64: dts: rockchip: enable gpu on Qnap-TS433

The TS433 doesn't provide display output, but the gpu nevertheless can be
used for compute tasks for example.

So there is no reason not to enable it.

Tested-by: Uwe Kleine-König <ukleinek@debian.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20240723195538.1133436-14-heiko@sntech.de
[ upstream commit: 9130eb62586f4cef0557d0378fb7e78d7397ab2d ]

(cherry picked from commit e324a9e8ea083ebdca207b5ca2ed86d2b5f862a0)
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>