hal: msmcobalt: update mixer controls for handset

msmcobalt uses speaker path for handset device usecase. Update
the handset mixer controls to use speaker path on msmcobalt.

Change-Id: Iff01d323fff8684837d38fd8e6f1401cd226fe01
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>