staging: rtl8712: recvbuf2recvframe(): Change return type

Change return type of recvbuf2recvframe from int to void as its return
value is never used. Modify or remove return statements accordingly.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190808064012.12661-5-nishkadg.linux@gmail.com


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