hal: Fix input buffer size for fractional rate 24bit capture

The input buffer size from ADSP must be a multiple of 32 bytes and a
multiple of the frame_size. For fractional sample rates (eg. 44.1kHz)
with 24bit packed samples, 32 is not the smallest common multiple.

Change-Id: Ifcef1daa4f43e90fdb30873192c0047677ae3c00