ARM: dts: exynos: Remove the cd-gpios property for eMMC of Odroid XU3/4

Odroid XU3/4 didn't need to use the cd-gpios for detecting card.
Because host controller has the CDETECT register through SDx_CDN line.
Host controller can know whether card is inserted or not with this
register.

When I have checked the Odroid XU3/4, they are using CDETECT register
(not using exteranl cd-gpio).
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi

@@ -510,7 +510,6 @@ hdmiddc@50 {
 &mmc_0 {
 	status = "okay";
 	mmc-pwrseq = <&emmc_pwrseq>;
-	cd-gpios = <&gpc0 2 GPIO_ACTIVE_LOW>;
 	card-detect-delay = <200>;
 	samsung,dw-mshc-ciu-div = <3>;
 	samsung,dw-mshc-sdr-timing = <0 4>;