net: ravb: Simplify max-speed handling in ravb_of_to_plat

We can call dev_read_u32_default() instead of calling fdt_getprop() then
fdt32_to_cpu().

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
1 file changed