ARM: dts: koelsch: Drop superfluous status updates for frequency overrides

The scif_clk and pcie_bus_clk device nodes are already enabled in
r8a7791.dtsi, so there is no need to update their statuses again.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>