linux-firmware: remove alternatives for brcmfmac-stdio.bin
These alternatives are only used to provide an unversioned brcmfmac-sdio.bin,
which was required by kernels prior to 3.13. As these alternatives all have the
same priority there's no determinism in which one is selected, and current
kernels (since January 2014) use the appropriately versioned firmware names.
Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
