ARM: dts: exynos: Add minimal clkout parameters to Exynos3250 PMU

Add minimal parameters needed by the Exynos CLKOUT driver to Exynos3250
PMU node. This fixes the following warning on boot:

exynos_clkout_init: failed to register clkout clock

Fixes: d19bb397 ("ARM: dts: exynos: Update PMU node with CLKOUT related data")
Cc: <stable@vger.kernel.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos3250.dtsi

@@ -168,6 +168,9 @@ pmu_system_controller: system-controller@10020000 {
 			interrupt-controller;
 			#interrupt-cells = <3>;
 			interrupt-parent = <&gic>;
+			clock-names = "clkout8";
+			clocks = <&cmu CLK_FIN_PLL>;
+			#clock-cells = <1>;
 		};
 
 		mipi_phy: video-phy {