RFR: 8282312: Minor corrections to evbroadcasti32x4 intrinsic on x86

[Jamil Nimeh]

Hello,

This makes a small change to the evbroadcasti32x4 method to make it consistent with the Intel SDM for the vbroadcasti32x4 instruction.  It sets the requirements to AVX512F rather than AVX512DQ, changes the Op/En field to be T4 instead of T2 and sets the width to 32-bits rather than 64.

Hotspot tier1 through 4 tests passed.  I also performed a 100,000 iteration run of the TestChecksum, TestCRC and TestCRC32 regression tests with intrinsics/diagnostics printing turned on so I could see that the methods that call the kernel_crc32_avx512 macro are invoked.

JBS: https://bugs.openjdk.java.net/browse/JDK-8282312

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Commit messages:
 - Merge
 - 8282312: Minor corrections to evbroadcasti32x4 intrinsic on x86

Changes: https://git.openjdk.java.net/jdk/pull/7732/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7732&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282312
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7732.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7732/head:pull/7732

PR: https://git.openjdk.java.net/jdk/pull/7732