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EPOUT is always mono so should have a permanent routing through the
HPOUT1 Mono Mux.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200925091830.7675-2-rf@opensource.cirrus.com

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