staging: rtl8712: r8712_set_auth(): Change return values

Change return values of r8712_set_auth from _SUCCESS/_FAIL to 0/-ENOMEM
respectively. Modify call site accordingly. Also change return type of
the function from sint to int.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190722092341.21030-2-nishkadg.linux@gmail.com


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