align with other Radxa products.

- mmc0 is eMMC
- mmc1 is microSD

for ZERO 3E, there is no eMMC, but aliases should start at 0, so mmc0
is microSD as exception.

Fixes: 1a5c8d30 ("arm64: dts: rockchip: Add Radxa ZERO 3W/3E")
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>

Changes in v3:
- fix syntax error in rk3566-radxa-zero-3e.dts
Changes in v2:
- microSD is mmc0 instead of mmc1 for ZERO 3E

Link: https://lore.kernel.org/r/20240620224435.2752-1-naoki@radxa.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>