ath5k: Put remaining EEPROM data on ee struct

* Put remaining EEPROM information on ee struct and remove is_hb63
 function.

 Now we also have rfkill stuff available.

Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>

Signed-off-by: John W. Linville <linville@tuxdriver.com>