ASoC: qcom: sc7180: Fix some indenting in sc7180_lpass_alloc_dma_channel()

This code is correct, but it should be indented one more tab.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20201103101853.GD1127762@mwandaSigned-off-by: NMark Brown <broonie@kernel.org>