The endianness flag is used on the CODEC side to specify an
ambivalence to endian, typically because it is lost over the hardware
link. This device receives audio over an I2S DAI and as such should
have endianness applied.

As the core will now expand the formats to cover both endian types,
remove the redundant manual specification of both.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220504170905.332415-20-ckeepax@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>