lib: [snow3g] Add Armv8.0 Neon baseline implementation for SNOW3G_UIA2
Add an Armv8.0 Neon baseline implementation of SNOW3G_UIA2 using carry-less multiplication. Update license headers to SPDX BSD-3-Clause. Update README.md tables for AArch64.
Signed-off-by: Islam Ragimov islam.ragimov@arm.com