staging: r8188eu: remove unneeded variable in rtw_p2p_get

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle

Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://lore.kernel.org/r/6c992e9481c7481aa5931635e162dd7a4400a2e2.1643466748.git.abdun.nihaal@gmail.com


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