Main change is the addition of the bktr_mem module.
This holds onto the bktr driver's contiguously allocated memory
when the bktr driver is unloaded and reloaded.
This has to be done because it is virtually impossible to get
contiguous memory once a system is running.
Also tidied up the use of SMBUS, added a new Hauppauge tuner type (0x2c)
and a new Flyvideo vendor ID.
