[Sound-open-firmware] SOF/Intel: change of directory structure for firmware binaries

[Pierre-Louis Bossart]

FYI, if anyone uses the latest SOF kernel branch (topic/sof-dev), there 
was a change in the location of the files used by the Linux kernel for 
Intel platforms:

firmware files are by default in /lib/firmware/intel/sof

topology files are in /lib/firmware/intel/sof-tplg.

You can override this by adding module arguments to go back to the 
previous setup.

modprobe sof-[pci|acpi]-dev fw_path=intel tplg_path=intel

This change was made so that firmware and topologies can be released 
separately, and allow a contributor company to release support for 
multiple platforms at the same time, with symlinks used for the 
directories instead of individual files. It'll also help distros or OEMs 
use non-default firmware locations for their own releases, if they 
included non-public components or change the firmware configurations.

Sorry for the inconvenience in the transition.

-Pierre