staging: r8188eu: go2asoc is not needed

Remove the go2asoc variable in OnAuthClient and call start_clnt_assoc
directly. This makes the code a tiny bit shorter.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20221024081417.66441-18-martin@kaiser.cx


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