ARM: dts: Fix pull setting in sd4_width8 pin group for exynos4x12

The group has the samsung,pin-pud property set to 4, which is not a
correct value. This patch fixes this by replacing it with 3, which is
the correct value for pull-up.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4x12-pinctrl.dtsi

@@ -675,7 +675,7 @@
 		sd4_bus8: sd4-bus-width8 {
 			samsung,pins = "gpk1-3", "gpk1-4", "gpk1-5", "gpk1-6";
 			samsung,pin-function = <4>;
-			samsung,pin-pud = <4>;
+			samsung,pin-pud = <3>;
 			samsung,pin-drv = <3>;
 		};