Relabelling of FW (bin) and mdules (.ko)

[E3V3A]

I suggest we start keeping track of the patched modules and firmware by changing their names to reflect what kernel they were compiled on. Something like:

brcmfmac43430-sdio_4.9.51p.bin  (for 4.9.51+)
brcmfmac._4.9.51p.ko (for 4.9.51+) 

alternatively put them in new sub-directories as seem attempted at NexMon repo. (Just too bad people doesn't upload/PR their patches there.)

This would make it easy to find and understand what to get, not to mentioned what's already been patched.