hal: set output bitwidth to 24 bit for 32 bit data.

 - parser gives 32 bit data for 24 bit AIFF playback and same
   is sent down to HAL.
 - So update bit width to 24 bit if offload info bit width is 32 bit
   to configure back end to 24 bit for 24 bit e2e playback.

Change-Id: I17cf4430b9d401c42817b75c4456617bdda78647