staging: rtl8712: remove Unnecessary parentheses

Reported by checkpatch:

CHECK: Unnecessary parentheses

Signed-off-by: Alaa Mohamed <eng.alaamohamedsoliman.am@gmail.com>
Link: https://lore.kernel.org/r/20220404211942.11446-1-eng.alaamohamedsoliman.am@gmail.com


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