Staging: rtl8723bs/core: fix brace coding style issue

Remove unnecessary braces identified by checkpatch.pl at lines 740,
1039,1602,1922,1939.

Signed-off-by: Brother Matthew De Angelis <matthew.v.deangelis@gmail.com>
Link: https://lore.kernel.org/r/8ddd195a246696e9315dacfcce06b7ba7f9d7d1a.1607209336.git.matthew.v.deangelis@gmail.com


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