Nothing sets the slave_id field any more, so stop accessing
it to allow the removal of this field.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211122222203.4103644-11-arnd@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>