staging: rtl8188eu: remove unnecessary parentheses in rtl8188e_dm.c

Remove unnecessary parentheses reported by checkpatch.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200114134422.13598-4-straube.linux@gmail.com


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