staging: rtl8723bs: fix broken indentation

fix indentation broken by patch removing conditional
code blocks checked by unused
CONFIG_INTERRUPT_BASED_TXBCN family defines

Fixes: 65f18300 (staging: rtl8723bs: remove unused code blocks conditioned by never set CONFIG_INTERRUPT_BASED_TXBCN*)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/20210326180632.1859-1-fabioaiuto83@gmail.com


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