ASoC: mediatek: mt8183: fix error handling of platform_get_irq()

platform_get_irq() returns negative value on error instead of 0.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200507015442.191336-1-tzungbi@google.com


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