staging: rtl8192e: Fix quoted string split across lines

Fix checkpatch.pl issues with quoted string split across lines in
dot11d.c

Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>