arm64: dts: rockchip: 'Fix' nanopi4 uSD card detect

For whatever reason, the sdmmc_dectn function isn't working properly
as-is, and microSD insertion and removal goes unnoticed. Using the pin
as a GPIO interrupt instead is rather noisy without any debouncing, but
is good enough to make it useful until someone feels inclined to figure
out how the vendor kernel/firmware gets the dedicated function to work
with no obvious difference in the pinmux/GRF configuration. Let's also
take the opportunity to tweak the node name so that all related pins
end up grouped together in the compiled DTB.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi

@@ -501,17 +501,21 @@ power_key: power-key {
 		};
 	};
 
-	sd {
-		sdmmc0_pwr_h: sdmmc0-pwr-h {
-			rockchip,pins = <0 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-	};
-
 	sdio-pwrseq {
 		wifi_reg_on_h: wifi-reg_on-h {
 			rockchip,pins = <0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	sdmmc {
+		sdmmc0_det_l: sdmmc0-det-l {
+			rockchip,pins = <0 RK_PA7 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		sdmmc0_pwr_h: sdmmc0-pwr-h {
+			rockchip,pins = <0 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
 };
 
 &pmu_io_domains {
@@ -563,9 +567,10 @@ &sdmmc {
 	bus-width = <4>;
 	cap-sd-highspeed;
 	cap-mmc-highspeed;
+	cd-gpios = <&gpio0 RK_PA7 GPIO_ACTIVE_LOW>;
 	disable-wp;
 	pinctrl-names = "default";
-	pinctrl-0 = <&sdmmc_bus4 &sdmmc_cd &sdmmc_clk &sdmmc_cmd>;
+	pinctrl-0 = <&sdmmc_bus4 &sdmmc_clk &sdmmc_cmd &sdmmc0_det_l>;
 	sd-uhs-sdr104;
 	vmmc-supply = <&vcc3v0_sd>;
 	vqmmc-supply = <&vcc_sdio>;