arm64: dts: rockchip: Disable HS400 for mmc on rk3399-roc-pc

arm64: dts: rockchip: Disable HS400 for mmc on rk3399-roc-pc

Working with rootfs on two 128GB mmcs on rk3399-roc-pc.

One (mmc name 128G72, one screw hole) works fine in HS400 mode.
Other (mmc name DJNB4R, firefly on pcb, two screw holes) gets lots of
mmc1: "running CQE recovery", even hangs with damaged fs,
when running under heavy load, e.g. compiling kernel.
Both run fine with HS200.

Disabling CQ with patch mmc: core: Add MMC Command Queue Support kernel parameter [0] did not help.
[0] https://gitlab.com/ayufan-repos/rock64/linux-mainline-kernel/commit/54e264154b87dfe32a8359b2726e2d5611adbaf3

Therefore I propose to disable HS400 mode on roc-pc for now.

Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Link: https://lore.kernel.org/r/367bf78a-f079-f0b4-68fe-52c86823c174@fivetechno.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>