On Beryllium architecture, PHY DMA applies a 32-bit byte swap to assist
in efficient Host reads when connected to a big-endian Host.
This is done to avoid byte swapping at the Host.
So, if the Host reads this data 32-bit word at a time, the byte order
would be intact. Report headers are not a problem because as they are
composed of 32-bit words. For FFT bins, read each DWORD at a time and
extract FFT bins out of that DWORD. Make this change in a generic way to
keep the design uniform across different chipsets and endian modes.
CRs-Fixed: 3042188
Change-Id: Idff1ac7eb5e18c692c9ee8b19b9ae9e6b962d486
d36115b849