staging: rtl8723bs: remove redundant braces in if statements

Adhere to Linux kernel coding style.

Reported by checkpatch:

WARNING: braces {} are not necessary for single statement blocks

Signed-off-by: Sevinj Aghayeva <sevinj.aghayeva@gmail.com>
Link: https://lore.kernel.org/r/20220331113245.GA425141@euclid


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