ARM: dts: fix T-FLASH hotplug detection for exynos4412-odroid-common

TFLASH (SDHCI2 controller) uses internal card detect line, but it looks
that the driver fails to operate it properly. Use GPIO interrupt on
SD_CDn line for detecting SD card state.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4412-odroid-common.dtsi

@@ -91,6 +91,8 @@ sdhci@12530000 {
 		pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_cd &sd2_bus4>;
 		pinctrl-names = "default";
 		vmmc-supply = <&ldo4_reg &ldo21_reg>;
+		cd-gpios = <&gpk2 2 0>;
+		cd-inverted;
 		status = "okay";
 	};