arm64: dts: visconti: Add 150MHz fixed clock to TMPV7708 SoC

This clock source is referred by baudrate generators of
SPI and I2C devices.
Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
Link: https://lore.kernel.org/r/20211014092703.15251-2-yuji2.ishikawa@toshiba.co.jpSigned-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>

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

@@ -148,6 +148,13 @@ clk125mhz: clk125mhz {
 		clock-output-names = "clk125mhz";
 	};
 
+	clk150mhz: clk150mhz {
+		compatible = "fixed-clock";
+		clock-frequency = <150000000>;
+		#clock-cells = <0>;
+		clock-output-names = "clk150mhz";
+	};
+
 	clk300mhz: clk300mhz {
 		compatible = "fixed-clock";
 		clock-frequency = <300000000>;