staging: r8188eu: remove initializer from ret in rtw_pwr_wakeup

staging: r8188eu: remove initializer from ret in rtw_pwr_wakeup

Remove the success initializer from the ret variable in rtw_pwr_wakeup,
as we set it later anyway in the success path, and also set on failure.
This makes the function appear cleaner and more consistent.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20220728231150.972-2-phil@philpotter.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>