ARM: dts: porter: Drop superfluous status update for frequency override

The pcie_bus_clk device node is already enabled in r8a7791.dtsi, so
there is no need to update its status again.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791-porter.dts

@@ -401,7 +401,6 @@ &usbphy {
 
 &pcie_bus_clk {
 	clock-frequency = <100000000>;
-	status = "okay";
 };
 
 &pciec {