The statement of the "if (afe_priv->mtkaif_protocol == MTKAIF_PROTOCOL_2)"
branch is the same as the "else" branch. Delete it to simplify code.

No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210510083640.3368-1-thunder.leizhen@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>