Add NSS-DRV from QSDK11.4.
NSS-DRV is the core NSS driver providing NSS firmware
loading and communication between NSS cores and
other NSS offloading drivers.
It includes patches to it in order to work under kernel 5.10.
Made for and tested on IPQ807x.
Signed-off-by: Robert Marko <robimarko@gmail.com>
