Remove the unwanted dma settings in rockchip_i2s_probe.

Fixes: 44f362c2 ("ASoC: rockchip: i2s: switch BCLK to GPIO")
Signed-off-by: NJudy Hsiao <judyhsiao@chromium.org>
Link: https://lore.kernel.org/r/20220629080421.2427933-1-judyhsiao@chromium.orgSigned-off-by: NMark Brown <broonie@kernel.org>