[PATCH] iwlwifi: fix sending probe request in iwl 4965

This patch removeis TSF flag from probe request. TSF should be added only to
probe response.

Signed-off-by: Helmut Schaa <hschaa@suse.de>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>