arm64: dts: rockchip: Add basic support for QNAP TS-433

This is enough to make eMMC, networking, UART (console), RTC and a hard
disk accessible. Still missing are (at least): USB, LEDs, regulators,
fan.

Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
Link: https://lore.kernel.org/r/0d9fa5d730ac1cb91261b25b6809fcef3a12f03a.1709034476.git.ukleinek@debian.org


Signed-off-by: Heiko Stuebner <heiko@sntech.de>