audio: hal: Fix to use correct EC_REF_RX

In 8610, we need to use I2S_RX as ec_ref_rx
parameter and for SLIM based targets use
SLIM_RX.

CRs-Fixed: 575647
Change-Id: Ia220498f302a58dc3dbd42b1874fa01f081ce3dd
hal: Add property to configure the compress offload fragment size.

Add property - audio.offload.buffer.size.kbytes to configure offload
fragment size. The maximum value for fragment size is 256k. Default
value is 32k. The minimum value is 8k.

Change-Id: I9b440a420270b27f5fdba9f82de6944da0afb9d2