Staging: w35und: move hal_init_hardware() and hal_halt() int wbusb.c

Impact: cleanup

The hal_init_hardware() and hal_halt() functions are only used in
wbusb.c so move them there.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>