staging: rtl8188eu: Fix strings split across lines

Fix the following checkpatch warning:
	WARNING: quoted string split across lines

Signed-off-by: Brooke Basile <brookebasile@gmail.com>
Link: https://lore.kernel.org/r/20200626153639.8097-2-brookebasile@gmail.com


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