staging: r8188eu: remove unused argument in chk_ap_is_alive

The function argument padapter is not used in chk_ap_is_alive.
Remove it.

Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://lore.kernel.org/r/17af206986d64f34e85acdf67b138edb4ccc0312.1644422181.git.abdun.nihaal@gmail.com


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