arm64: dts: rockchip: Update eMMC, SD aliases for Radxa SoM boards

Radxa has produced Compute Modules like RK3399pro VMARC and CM3i with
onboarding eMMC flash, so the eMMC is the primary MMC device.

On the other hand, Rockchip boot orders start from eMMC from an MMC
device perspective.

Mark, the eMMC has mmc0 to satisfy the above two conditions.

Reported-by: FUKAUMI Naoki <naoki@radxa.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Link: https://lore.kernel.org/r/20230118080454.11643-1-jagan@amarulasolutions.com


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