ASoC: mediatek: mt8173: Fix irq error path

After reordering the irq probe, the error path was not properly done.
Lets fix it.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Cc: stable@kernel.org
Fixes: 4cbb264d4e91 ("ASoC: mediatek: mt8173: Enable IRQ when pdata is ready")
Signed-off-by: Ricardo Ribalda Delgado <ribalda@chromium.org>