ARM: tegra: Add to struct harmony_audio_platform_data

Add fields to describe all the audio-related GPIOs on Harmony, except for
the codec's GPIO IRQ, which will be passed in its i2c_board_info.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>