staging: rtl8723bs: Remove blank line before '}' brace

Remove unneeded blank line before a close brace '}'.
Issue found by checkpatch.pl:
CHECK: Blank lines aren't necessary before a close brace '}'

Signed-off-by: Simran Singhal <singhalsimran0@gmail.com>
Link: https://lore.kernel.org/r/20200325182617.GA9411@simran-Inspiron-5558


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