staging: r8188eu: remove the bretry variable

Remove the bretry variable. It's set and used only once. Call the
ieee80211 helper directly.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220403165438.357728-12-martin@kaiser.cx


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