staging:rtl8188eu:core Fix coding style Issues

This patch solves the following warning shown by the checkpatch script
WARNING: Comparisons should place the constants on the right side of
the test

Signed-off-by: Janani Sankara Babu <jananis37@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>