Staging: rtl8188eu: Add space around operator

Add space around & operator for improving the code
readability.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Acked-by: Julia Lawall <julia.lawall@inria.fr>
Link: https://lore.kernel.org/r/20200308192152.26403-1-shreeya.patel23498@gmail.com


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