arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization

arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization

Eric reports errors on emmc with hs400 mode when booting linux on bpi-r3
without uboot [1]. Booting with uboot does not show this because clocks
seem to be initialized by uboot.

Fix this by adding assigned-clocks and assigned-clock-parents like it's
done in uboot [2].

[1] https://forum.banana-pi.org/t/bpi-r3-kernel-fails-setting-emmc-clock-to-416m-depends-on-u-boot/15170
[2] https://github.com/u-boot/u-boot/blob/master/arch/arm/dts/mt7986.dtsi#L287

Cc: stable@vger.kernel.org
Fixes: 513b49d19b34 ("arm64: dts: mt7986: add mmc related device nodes")
Signed-off-by: Eric Woudstra <ericwouds@gmail.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231025170832.78727-2-linux@fw-web.de
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>