tegra3-common: system/audio.h: Use correct DEVICE_BIT_IN bits

This fixes various input steam routing problems (e.g handsfree calling).

The values can be obtained by looking at the stock audio.primary.tegra.so
or audio_policy.tegra.so with a dissasembler and searching for the
corresponding field names.

Change-Id: Ice4362ba7e559d7a5c31bf45a1d5e62e795feb2b