staging: rtl8723bs: Remove unnecessary braces for single statements

Clean up unnecessary braces around single statement blocks.
Issues reported by checkpatch.pl as:
WARNING: braces {} are not necessary for single statement blocks

Signed-off-by: Simran Singhal <singhalsimran0@gmail.com>
Link: https://lore.kernel.org/r/20200325140245.GA11949@simran-Inspiron-5558


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