ASoC: rt5665: set i2s pin share configuration

I2S2 and I2S3 are share pins. We need to configure it when i2s is
active and disable it when i2s is inactive. To disable i2s pins
means to set them as gpio.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>