staging: rtl8712: Fix multiple blank lines warning from .h files

This patch fixes the checkpatch.pl warnings like:
CHECK: Please don't use multiple blank lines
+
+
from rtl8712_*.h, rtl871x_*.h, sta_info.h, and wifi.h

Signed-off-by: Sathish Kumar <skumark1902@gmail.com>
Link: https://lore.kernel.org/r/20220404034706.2384-1-skumark1902@gmail.com


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