ARM: dts: renesas: Synchronize R-Car R8A779A0 E3 DTs with Linux 6.5.3

Synchronize R-Car R8A779A0 E3 DTs with Linux 6.5.3,
commit 238589d0f7b421aae18c5704dc931595019fa6c7 .

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/arch/arm/dts/r8a779a0-falcon.dts b/arch/arm/dts/r8a779a0-falcon.dts
index b2e67b8..63db822 100644
--- a/arch/arm/dts/r8a779a0-falcon.dts
+++ b/arch/arm/dts/r8a779a0-falcon.dts
@@ -37,8 +37,12 @@
 	};
 };
 
+&can_clk {
+	clock-frequency = <40000000>;
+};
+
 &canfd {
-	pinctrl-0 = <&canfd0_pins>, <&canfd1_pins>;
+	pinctrl-0 = <&canfd0_pins>, <&canfd1_pins>, <&can_clk_pins>;
 	pinctrl-names = "default";
 	status = "okay";
 
@@ -80,6 +84,11 @@
 
 	};
 
+	can_clk_pins: can-clk {
+		groups = "can_clk";
+		function = "can_clk";
+	};
+
 	canfd0_pins: canfd0 {
 		groups = "canfd0_data";
 		function = "canfd0";