ASoC: rt1015: modify some structure to be static.

Modify rt1015_aif_dai_ops and rt1015_dai[] to be static.

Signed-off-by: Jack Yu <jack.yu@realtek.com>
Link: https://lore.kernel.org/r/20200227020637.15135-1-jack.yu@realtek.com


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