arm64: dts: rockchip: fix rk3308-roc-cc vcc-sd supply

Correct a typo in the vin-supply property.  The input supply is
always-on, so this mistake doesn't affect whether the supply is actually
enabled correctly.

Fixes: 4403e123 ("arm64: dts: rockchip: Add devicetree for board roc-rk3308-cc")
Signed-off-by: NJohn Keeping <john@metanate.com>
Link: https://lore.kernel.org/r/20211102182908.3409670-2-john@metanate.comSigned-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3308-roc-cc.dts

@@ -97,7 +97,7 @@
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
 		regulator-boot-on;
-		vim-supply = <&vcc_io>;
+		vin-supply = <&vcc_io>;
 	};
 
 	vdd_core: vdd-core {