staging: rtl8723bs: remove return from a function returning void

Adhere to Linux kernel coding style.

Reported by checkpatch:

WARNING: void function return statements are not generally useful

Signed-off-by: Sevinj Aghayeva <sevinj.aghayeva@gmail.com>
Link: https://lore.kernel.org/r/d1aa09f34cd192e284048999ba8e20d26a224483.1649128267.git.sevinj.aghayeva@gmail.com


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