staging: rtl8723bs: replace code indent as tabs

This patch removes error below generated by checkpatch

ERROR: code indent should use tabs where possible

Signed-off-by: Kang Minchul <tegongkang@gmail.com>
Link: https://lore.kernel.org/r/20220922122310.3379711-2-tegongkang@gmail.com


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