dt-bindings: net: micrel: KSZ8041RNLI supports LED mode

dt-bindings: net: micrel: KSZ8041RNLI supports LED mode

Micrel KSZ8041RNLI supports LED mode, just like KSZ8041.

This fixes (a.o.) the following "make dtbs_check" warning:

    arch/arm/boot/dts/renesas/r8a7791-koelsch.dtb: ethernet-phy@1 (ethernet-phy-id0022.1537): False schema does not allow 1
	    from schema $id: http://devicetree.org/schemas/net/micrel.yaml

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Stefan Eichenberger <eichest@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/efad6c7e024b3a9aa2882db65909ee5bbbcbdc45.1773734298.git.geert+renesas@glider.be
Signed-off-by: Jakub Kicinski <kuba@kernel.org>