staging: rtl8712: Remove multiple blank lines

Fix checkpatch.pl CHECK:
CHECK: Please don't use multiple blank lines

Signed-off-by: Aakash Hemadri <aakashhemadri123@gmail.com>
Link: https://lore.kernel.org/r/20210209153709.128676-1-aakashhemadri123@gmail.com


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