arm64: dts: renesas: hihope-common: Declare pcie bus clock

Declare pcie bus clock, since it is generated on the HiHope RZ/G2M main
board.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/hihope-common.dtsi

@@ -26,6 +26,10 @@
 	clock-frequency = <32768>;
 };
 
+&pcie_bus_clk {
+	clock-frequency = <100000000>;
+};
+
 &pfc {
 	pinctrl-0 = <&scif_clk_pins>;
 	pinctrl-names = "default";