staging: rtl8712: removed extra blank line

Removed an extra blank line so that only one blank line is present in
between two functions which separates them out.
Reported by checkpatch

Signed-off-by: Mitali Borkar <mitaliborkar810@gmail.com>
Link: https://lore.kernel.org/r/YG5ppTlGhRp5WVgS@kali


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