RFR: 8368861: [TEST] compiler/floatingpoint/ScalarFPtoIntCastTest.java expects x86 IR on non-x86 platforms [v2]

[Richard Reingruber]

> This removes X86 specific IR checks that are applied if the X86 specific feature *avx10_2* is not present.
> 
> We could make the checks dependent on the platform being X86 if we wanted to keep them but I don't see a value in doing so.
> 
> Tested on X86 and PPC64

Richard Reingruber has updated the pull request incrementally with one additional commit since the last revision:

  Keep checks and limit them to x64

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/27546/files
  - new: https://git.openjdk.org/jdk/pull/27546/files/00db7b16..42f1492f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27546&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27546&range=00-01

  Stats: 24 lines in 1 file changed: 24 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27546.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27546/head:pull/27546

PR: https://git.openjdk.org/jdk/pull/27546