ssid len is 32 bit and needs endian conversion for big endian systems.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: NHante Meuleman <meuleman@broadcom.com>
Signed-off-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>