riscv: dts: canaan: remove spi-max-frequency from controllers

spi-max-frequency is a device, not a controller  property and should be
removed.

Link: https://lore.kernel.org/lkml/20220526014141.2872567-1-robh@kernel.org/
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
1 file changed