arm64: dts: rockchip: fix typo in mmc pinctrl

replace all occurrences of sdmcc with sdmmc in the arm64 rockchip
devicetree files.
Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi

@@ -1031,7 +1031,7 @@ sdmmc_cmd: sdmmc-cmd {
 		 * hurt and dw_mmc will ignore it.  We make sure to disable
 		 * the pull though so we don't burn needless power.
 		 */
-		sdmmc_cd: sdmcc-cd {
+		sdmmc_cd: sdmmc-cd {
 			rockchip,pins =
 				<0 7 RK_FUNC_1 &pcfg_pull_none>;
 		};

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -1786,7 +1786,7 @@ sdmmc_cmd: sdmmc-cmd {
 					<4 RK_PB5 RK_FUNC_1 &pcfg_pull_up>;
 			};
 
-			sdmmc_cd: sdmcc-cd {
+			sdmmc_cd: sdmmc-cd {
 				rockchip,pins =
 					<0 RK_PA7 RK_FUNC_1 &pcfg_pull_up>;
 			};