[pvrusb2] WinTV-HVR-1950 will not load firmware

[Mike Isely]

Got some more information about this firmware issue - the reason why the 
manual extraction didn't work is becaues the FX2 firmware image is now 
16KB!  The extraction process is only getting the first 8KB which of 
course doesn't work.  I had suspect this before; now I'm sure.

I have a copy of the 16KB FX2 firmware for the HVR-1950.  It's trivial 
to train fwextract.pl to find this (that script doesn't actually care 
about firmware size).  However every pvrusb2 driver version in existence 
since the beginning only accepts 8KB-sized FX2 firmware.  This is not 
difficult to fix, but it will require a new driver version and 
unfortunately this new firmware is not going to work with any in-kernel 
driver - because they all will predate this fix :-(

It's going to be fun documenting this, and I'll have to also make some 
changes to the manual extraction procedure so that a 16KB blob can be 
pulled now.  Stay tuned.

  -Mike