arm64: zynqmp: Describe assigned-clocks for uarts

Describe assigned-clocks for both uarts. SOM is using this functionality.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/bddbb81209a4567b0939c5d2d0ecb42fdfcd71ea.1695036114.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp-clk-ccf.dtsi b/arch/arm/dts/zynqmp-clk-ccf.dtsi
index 1ae8ea2..9c0aa07 100644
--- a/arch/arm/dts/zynqmp-clk-ccf.dtsi
+++ b/arch/arm/dts/zynqmp-clk-ccf.dtsi
@@ -253,10 +253,12 @@
 
 &uart0 {
 	clocks = <&zynqmp_clk UART0_REF>, <&zynqmp_clk LPD_LSBUS>;
+	assigned-clocks = <&zynqmp_clk UART0_REF>;
 };
 
 &uart1 {
 	clocks = <&zynqmp_clk UART1_REF>, <&zynqmp_clk LPD_LSBUS>;
+	assigned-clocks = <&zynqmp_clk UART1_REF>;
 };
 
 &usb0 {