ARM: dts: Add clksel node for am3 clkout

Let's add a clksel node for the component clocks to avoid devicetree
unique_unit_address warnings. The component clocks can now get IO address
from the parent clksel node.

Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Tero Kristo <kristo@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Message-Id: <20220204073333.18175-4-tony@atomide.com>

arch/arm/boot/dts/am33xx-clocks.dtsi

@@ -524,28 +524,35 @@ gfx_fck_div_ck: clock-gfx-fck-div {
 		};
 	};
 
-	sysclkout_pre_ck: sysclkout_pre_ck@700 {
+	clock@700 {
+		compatible = "ti,clksel";
+		reg = <0x700>;
+		#clock-cells = <2>;
+		#address-cells = <0>;
+
+		sysclkout_pre_ck: clock-sysclkout-pre {
 			#clock-cells = <0>;
 			compatible = "ti,mux-clock";
+			clock-output-names = "sysclkout_pre_ck";
 			clocks = <&clk_32768_ck>, <&l3_gclk>, <&dpll_ddr_m2_ck>, <&dpll_per_m2_ck>, <&lcd_gclk>;
-		reg = <0x0700>;
 		};
 
-	clkout2_div_ck: clkout2_div_ck@700 {
+		clkout2_div_ck: clock-clkout2-div {
 			#clock-cells = <0>;
 			compatible = "ti,divider-clock";
+			clock-output-names = "clkout2_div_ck";
 			clocks = <&sysclkout_pre_ck>;
 			ti,bit-shift = <3>;
 			ti,max-div = <8>;
-		reg = <0x0700>;
 		};
 
-	clkout2_ck: clkout2_ck@700 {
+		clkout2_ck: clock-clkout2 {
 			#clock-cells = <0>;
 			compatible = "ti,gate-clock";
+			clock-output-names = "clkout2_ck";
 			clocks = <&clkout2_div_ck>;
 			ti,bit-shift = <7>;
-		reg = <0x0700>;
+		};
 	};
 };