arm64: dts: rockchip: move NanoPC-T6 parts to DTS

arm64: dts: rockchip: move NanoPC-T6 parts to DTS

MiniPCIe slot is present only in first version of NanoPC-T6 (2301).

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Link: https://lore.kernel.org/r/20240829-friendlyelec-nanopc-t6-lts-v6-3-edff247e8c02@linaro.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[ upstream commit: aea8d84070fe0846961deb23228d9dd3f8caefb3 ]

(cherry picked from commit 697963b1c22336a44ac2e33536c652aae1671b3d)
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>