arm64: dts: rockchip: remove bus-width from mmc nodes in rk3308-roc-cc

The 'bus-width' property for mmc nodes is defined both in
'rk3308.dtsi' and 'rk3308-roc-cc.dts'.
'bus-width' and pinctrl containing the bus-pins
should be in the same file, so remove all entries
from mmc nodes in 'rk3308-roc-cc.dts'.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200415131057.2366-1-jbx6244@gmail.com


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