spi: meson-spicc: setup IO line delay

Now the controller can support frequencies higher than 30MHz, we need
the setup the I/O line delays in regard of the SPI clock frequency.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20200312133131.26430-7-narmstrong@baylibre.com


Signed-off-by: Mark Brown <broonie@kernel.org>