ASoC: mediatek: mt8195: Fix unused initialization of pointer etdm_data

The pointer etdm_data is being inintialized with a value that is never
read, it is later being re-assigned a new value. Remove the redundant
initialization.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20210903114928.11743-1-colin.king@canonical.com


Signed-off-by: Mark Brown <broonie@kernel.org>