staging: rtl8723bs: Fix checkpatch.pl warnings

This patch resolves coding style brace warning and constant on right warning.
WARNING: Comparisons should place the constant on the right side of the test
WARNING: braces {} are not necessary for single statement blocks
CHECK: Comparison to NULL could be written "!pbuf"

Signed-off-by: Vandana BN <bnvandana@gmail.com>
------
 v2- Edited commit message and subject
 v3- Edited commit message
 v4- changed NULL check to use !pbuf
------

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vandana BN 2019-04-29 21:30:45 +05:30 • committed by Greg Kroah-Hartman
commit 601d6f0360