staging: brcm80211: brcmfmac: Removed codeversion from firmware filenames.

The basename-apiversion-codeversion construction for firmware filenames is not
used by most other firmware files, adds complexity, and is not providing any
value.  Rename the firmware files using just basename-apiversion.

Users of the brcmfmac driver will need to update the linux-firmware package
to get the renamed files, or manually rename their installed firmware files.

Signed-off-by: Henry Ptasinski <henryp@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>