staging: rtl8712: Remove extra blank lines

Remove extra blank lines after an open brace to adhere to Linux kernel
coding style.
Reported by checkpatch.

Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Link: https://lore.kernel.org/r/f61f6d330bc3fa53d4d420754d1d461b6cfcb2de.1617708653.git.zhansayabagdaulet@gmail.com


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