NDAS Change the license in ndas_core_main.c to proper string

The change is listed on the kernel documentation as one of the
acceptable license idents.

Signed-off-by: David Gates <linux@iocellnetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change license version in sal.c

Compliling showed an error when the license was GPLv2. It worked
after separating the version from the type. We will use the
Dual BSD/GPL license though, since it may offer wider availability.

Signed-off-by: David Gates <linux@iocellnetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>