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

BugLink: https://bugs.launchpad.net/bugs/1822271

commit a66352e0 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

arch/arm/boot/dts/exynos3250.dtsi

@@ -150,6 +150,9 @@ 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@10020710 {