staging: rtl8712: r8712_xmit_direct(): Change return type

Change return type of r8712_xmit_direct from int to void as its return
value is never used. Remove return statement accordingly.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190809052353.5308-6-nishkadg.linux@gmail.com


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