staging: rtl8188eu: Remove unnecessary extra parentheses

Remove unnecessary extra parentheses to improve code readability.

Signed-off-by: Soumyajit Deb <debsoumyajit100@gmail.com>
Link: https://lore.kernel.org/r/20200406111706.25957-3-debsoumyajit100@gmail.com


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