ASoC: rockchip: Fix dai_name for HDMI codec

Commit 24069b58 ("ASoC: hdmi-codec: remove multi detection support")
changed the dai_name for the HDMI Codec, breaking the rk3288_hdmi_analog
driver, which fails to register with a:

  rk3288-snd-hdmi-analog sound: ASoC: CODEC DAI hdmi-hifi.0 not registered

This commit fixes the dai_name, fixing the issue.

Fixes: 24069b58 ("ASoC: hdmi-codec: remove multi detection support")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>