ARM: dts: exynos: fix UART3 pins configuration in Exynos5250

The gpa1-4 pin was put twice in UART3 pin configuration of Exynos5250,
instead of proper pin gpa1-5.

Fixes: f8bfe2b0 ("ARM: dts: add pin state information in client nodes for Exynos5 platforms")
Cc: <stable@vger.kernel.org>
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Tested-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: NAlim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20211230195325.328220-1-krzysztof.kozlowski@canonical.com

arch/arm/boot/dts/exynos5250-pinctrl.dtsi

@@ -260,7 +260,7 @@
 	};
 
 	uart3_data: uart3-data {
-		samsung,pins = "gpa1-4", "gpa1-4";
+		samsung,pins = "gpa1-4", "gpa1-5";
 		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
 		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
 		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;