Staging: w35und: more simplify hal_init_hardware() error handling

Impact: fix, cleanup

If initialization in hal_init_hardware() fails, we call hal_halt() to
clean up and release resource. However, hal_halt() will attempt to
call del_timer_sync() on ->LEDTimer on "stage 3" although it's not
initialized at that point. Fix that up by simplifying error handling
logic in hal_init_hardware() with gotos.

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>