Comment # 14 on bug 91880 from Alex Deucher

(In reply to John Frei from comment #13)
> Created attachment 118933 [details]
> modinfo_radeon
> 
> Here's the output of 'modinfo radeon'.
> 
> As you can see, the uppercase 'HAWAII_*' firmware is still listed, too,
> although these files were deleted from the /lib/firmware/radeon/ directory.

The upper case ones were the original versions without the header information. 
They are only used for backwards compatibility.  All you need is the lower case
ones.