arm64: dts: rockchip: Update sdhci alias for rock-5b

In the previous version, the sdhci alias was set to mmc1: an artifact
leftover from the port from vendor kernel. Update the alias to mmc0 to
match the device's boot order.

Fixes: 6fb2d1549786 ("arm64: dts: rockchip: Add rock-5b board")
Signed-off-by: Christopher Obbard <chris.obbard@collabora.com>
Link: https://lore.kernel.org/r/20230110195352.272360-4-chris.obbard@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts

@@ -9,7 +9,7 @@ / {
 	compatible = "radxa,rock-5b", "rockchip,rk3588";
 
 	aliases {
-		mmc1 = &sdhci;
+		mmc0 = &sdhci;
 		serial2 = &uart2;
 	};