This field is no longer set from any driver now, so remove the
last references as well.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211122222203.4103644-3-arnd@kernel.orgSigned-off-by: NVinod Koul <vkoul@kernel.org>