Implement SVE 8-buffer SNOW3G UEA2

    Following changes have be done in this patch.
    1. Add job manager of snow3g uea2, this manager can schedule
       8-buffer with un-uniform length and different keys.
    2. Add 8-buffer implementation of underlying algorithm of snow3g,
       such as s1 box, s2 box, multiply alpha and divide alpha.

    Compared with 4-buffer NEON implementation, the throughput
    improvement on different micro-archetecutre is listed below.
      Neoverse V1 : x1.44 @ 1024 buffer-sz

    We use DPDK command to calculate performance improvement.
      sudo ./build/app/dpdk-test-crypto-perf -c 0x3 --no-huge
          --vdev crypto_snow3g -- --devtype crypto_snow3g
          --ptest throughput --pool-sz 16384 --total-ops 1000000
          --burst-sz 8 --optype cipher-only --cipher-algo snow3g-uea2
          --cipher-iv-sz 16 --auth-op generate --cipher-key-sz 16
          --buffer-sz 64,128,256,512,1024 --cipher-op encrypt

Signed-off-by:  <fisher.yu&lt;fisher.yu@arm.com>
Change-Id: Ic3c62ba6936eff904f3767386e97edf00a795843