arm64: dts: rockchip: reorder mmc aliases for NanoPi R3S

arm64: dts: rockchip: reorder mmc aliases for NanoPi R3S

Typically any non-removable storage (emmc) is listed before removable
storage (sd-card) options. Also U-Boot will try to override and use
mmc0=sdhci and mmc1=sdmmc0 for all rk356x boards.

Fixes: 50decd493c83 ("arm64: dts: rockchip: Add FriendlyARM NanoPi R3S board")
Suggested-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Link: https://lore.kernel.org/r/20241022193537.1117919-6-cnsztl@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>