The Amlogic G12A SPICC controllers uses a secondary clock used to feed the
baud rate generator and the delay control logic.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20200312133131.26430-9-narmstrong@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>