staging: wfx: fix double init of tx_policy_upload_work

The work_struct tx_policy_upload_work was initialized twice.

Fixes: 99879121

 ("staging: wfx: fix the cache of rate policies on interface reset")
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200427134031.323403-12-Jerome.Pouiller@silabs.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>