staging: rtl8723bs: core: Change NULL comparison to Boolean negation

Change NULL comparison to Boolean negation. Issue found with Coccinelle
using matchnull.cocci.

Signed-off-by: Nishka Dasgupta <nishka.dasgupta@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nishka Dasgupta 2019-03-22 00:18:46 +05:30 • committed by Greg Kroah-Hartman
commit 8cf0466a2d