staging: rtl8723bs: Make switch and case at the same indent

This patch fixes switch and case as linux kernel coding style
and amend this error generated by checkpatch:

  ERROR: switch and case should be at the same indent
Signed-off-by: Kang Minchul <tegongkang@gmail.com>
Link: https://lore.kernel.org/r/20220922122310.3379711-4-tegongkang@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>