RFR: 8258932: AArch64: Enhance floating-point Min/MaxReductionV with fminp/fmaxp

[Dong Bo]

This patch optimizes vectorial Min/Max reduction of two floating-point numbers on aarch64 with NEON instructions `fmaxp` and `fminp`.

Passed jtreg tier1-3 tests with `linux-aarch64-server-fastdebug` build.
Tests under `test/jdk/jdk/incubator/vector/` runned specially for the correctness and passed.

Introduced a JMH micro `test/micro/org/openjdk/bench/vm/compiler/VectorReductionFloatingMinMax.java` is used for performance test.
Witnessed abount `37%` performance improvements on Kunpeng916. The JMH Results:
Benchmark                (COUNT)  (seed)  Mode  Cnt    Score   Error  Units
# Kunpeng 916, default
VectorReduction.maxRedD      512       0  avgt   10  678.126 ± 0.815  ns/op
VectorReduction.maxRedF      512       0  avgt   10  242.958 ± 0.212  ns/op
VectorReduction.minRedD      512       0  avgt   10  678.554 ± 0.824  ns/op
VectorReduction.minRedF      512       0  avgt   10  243.368 ± 0.205  ns/op

# Kunpeng 916, with fmaxp/fminp
VectorReduction.maxRedD      512       0  avgt   10  430.201 ± 0.353  ns/op => 36.56%
VectorReduction.maxRedF      512       0  avgt   10  243.404 ± 0.297  ns/op
VectorReduction.minRedD      512       0  avgt   10  427.805 ± 0.528  ns/op => 36.89%
VectorReduction.minRedF      512       0  avgt   10  242.963 ± 0.210  ns/op

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Commit messages:
 - Update copyright
 - 8258932: AArch64: Enhance floating-point Min/MaxReductionV with fminp/fmaxp

Changes: https://git.openjdk.java.net/jdk/pull/1925/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1925&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258932
  Stats: 647 lines in 7 files changed: 223 ins; 92 del; 332 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1925.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1925/head:pull/1925

PR: https://git.openjdk.java.net/jdk/pull/1925