staging: rtl8188eu: Fix long lines

This patch fix long lines found by checkpatch.

Signed-off-by: Fan Fei <ffclaire1224@gmail.com>
Link: https://lore.kernel.org/r/20201008185524.brl467kucslxoxci@ubuntu-T470


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