arm64: dts: visconti: Update the clock providers for watchdog timer

Remove fixed clock and source common clock for watchdog timer.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Link: https://lore.kernel.org/r/20220510015229.139818-4-nobuhiro1.iwamatsu@toshiba.co.jp/

Author: iwamatsu-t

arch/arm64/boot/dts/toshiba/tmpv7708-rm-mbrc.dts

@@ -58,7 +58,6 @@
 
 &wdt {
 	status = "okay";
-	clocks = <&wdt_clk>;
 };
 
 &gpio {

arch/arm64/boot/dts/toshiba/tmpv7708-visrobo-vrc.dtsi

@@ -13,7 +13,6 @@
 
 &wdt {
 	status = "okay";
-	clocks = <&wdt_clk>;
 };
 
 &gpio {

arch/arm64/boot/dts/toshiba/tmpv7708.dtsi

@@ -171,12 +171,6 @@
 		clock-output-names = "extclk100mhz";
 	};
 
-	wdt_clk: wdt-clk {
-		compatible = "fixed-clock";
-		clock-frequency = <150000000>;
-		#clock-cells = <0>;
-	};
-
 	osc2_clk: osc2-clk {
 		compatible = "fixed-clock";
 		clock-frequency = <20000000>;
@@ -490,6 +484,7 @@
 		wdt: wdt@28330000 {
 			compatible = "toshiba,visconti-wdt";
 			reg = <0 0x28330000 0 0x1000>;
+			clocks = <&pismu TMPV770X_CLK_WDTCLK>;
 			status = "disabled";
 		};