Staging: rtl8192e: printing the wrong array

Smatch complained that there is an array overflow here.  It looks
like we are supposed to be printing the ->rates_ex[] array which is
slightly larger than the ->rates[] array.  This is a cut and paste
error.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>