staging: r8188eu: correct error logic of _rtw_init_recv_priv()

staging: r8188eu: correct error logic of _rtw_init_recv_priv()

Convert the function _rtw_init_recv_priv() away from returning _FAIL
and _SUCCESS, which uses inverted error logic. Return 0 for success
and negative values for failure instead.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20230205080559.8319-3-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>