[jdk25u] RFR: 8354937: Cleanup some sparc related coding in os_linux

[Matthias Baesken]

8354937: Cleanup some sparc related coding in os_linux

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

Commit messages:
 - Backport 1b3889a47092e018ab9ecb6aaa922046d8d0e916

Changes: https://git.openjdk.org/jdk25u/pull/390/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=390&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354937
  Stats: 7 lines in 1 file changed: 0 ins; 6 del; 1 mod
  Patch: https://git.openjdk.org/jdk25u/pull/390.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/390/head:pull/390

PR: https://git.openjdk.org/jdk25u/pull/390