drm/vc4: Migrate to new style legacy DAI naming flag

drm/vc4: Migrate to new style legacy DAI naming flag

Change the legacy DAI naming flag from opting in to the new scheme
(non_legacy_dai_naming), to opting out of it (legacy_dai_naming).
This driver appears to be on the CPU side of the DAI link and
currently uses the legacy naming, so add the new flag.

Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220623125250.2355471-4-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>