ASoC: qcom: q6afe-dai: fix Display Port Playback stream name

ASoC: qcom: q6afe-dai: fix Display Port Playback stream name

With recent changes to add more display ports did not change the Stream
name in q6afe-dai. This results in below error
"ASoC: Failed to add route DISPLAY_PORT_RX -> Display Port Playback(*)"
and sound card fails to probe.

Fix this by adding correct stream name.

Fixes: 90848a2557fe ("ASoC: qcom: q6dsp: add support to more display ports")
Reported-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230705124850.40069-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>