Staging: rtl8723bs/core: add blank line after declarations

Fix coding style issue.
Add blank line after variable declarations at all the locations found by
checkpatch.pl.

Signed-off-by: Brother Matthew De Angelis <matthew.v.deangelis@gmail.com>
Link: https://lore.kernel.org/r/20201206025945.GA464875@a


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