ARM: tegra: Enable SGTL5000 audio

The NVIDIA Tegra 3 aka T30 based Apalis T30 and Colibri T30 as well as
the new Tegra K1 aka TK1 based Apalis TK1 modules contain a Freescale
SGTL5000 analogue audio codec.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>