arm64: dts: ls208xa: support SD UHS-I on RDB and eMMC HS200 on QDS

This patch is to enable SD UHS-I mode on LS208xRDB and eMMC HS200
mode on LS208xQDS in dts. Also, the eSDHC peripheral clock must be
used instead of platform clock to support these modes.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>