ALSA: jack: Add support to report second microphone

ALSA jack framework currently supports reporting only
one single microphone. Add support to report presence of
the second microphone to userspace.

Change-Id: I72d16892f2fa563c026bf90d847d9365dcf2233a
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Meng Wang <mwang@codeaurora.org>