Add AUDIO_DEVICE_BIT_IN for mako again

Otherwise initialization fails at runtime:

D: [pulseaudio] droid-util.c:   New input mapping primary
E: [pulseaudio] droid-util.c: Assertion 'pa_droid_input_port_name(cur_device, &name)'
failed at /home/morphis/work/wop/work/pulseaudio-modules-droid/src/droid/droid-util.c:818,
function add_i_ports(). Aborting.

Signed-off-by: Simon Busch <morphis@gravedo.de>