ASoC: amd: raven: Make the driver name consistent across files

ASoC: amd: raven: Make the driver name consistent across files

This fixes the issue of driver not getting auto loaded with
MODULE_ALIAS.

With this patch:
$find /sys/devices -name modalias -print0 | xargs -0 grep -i acp3x
/sys/devices/pci0000:00/0000:00:08.1/0000:03:00.5/acp3x_i2s_playcap.2/
modalias:platform:acp3x_i2s_playcap
/sys/devices/pci0000:00/0000:00:08.1/0000:03:00.5/acp3x_i2s_playcap.0/
modalias:platform:acp3x_i2s_playcap
/sys/devices/pci0000:00/0000:00:08.1/0000:03:00.5/acp3x_rv_i2s_dma.0/
modalias:platform:acp3x_rv_i2s_dma
/sys/devices/pci0000:00/0000:00:08.1/0000:03:00.5/acp3x_i2s_playcap.1/
modalias:platform:acp3x_i2s_playcap

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Link: https://lore.kernel.org/r/20200518043913.40646-1-akshu.agrawal@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>