staging: r8188eu: refactor status handling in usb_write_port_complete

Refactor the satus handling in usb_write_port_complete. Make it clearer
what happens for each status and avoid all the goto statements.

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/20230110205626.183516-2-martin@kaiser.cx


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