staging: bcm: remove driver

The Beceem WiMAX driver was barely function in its current state
and was non-functional on 64 bit systems.  Based on repeated
statements from Greg KH that he wanted the driver removed, I am
removing the driver.

CC: Matthias Beyer <mail@beyermatthias.de>
CC: Kevin McKinney <klmckinney1@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>