RFR: 8254811: JDK-8254158 broke ppc64, s390 builds

[Martin Doerr]

"frame::interpreter_frame_initial_sp_offset" is currently used in shared POSIX code, but doesn't exist on ppc64 and
s390. These platforms use frame pointers instead of initial sp for reserved zone checks. See comments in
InterpreterMacroAssembler::remove_activation on these platforms. So we must not add any offset.

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Commit messages:
 - 8254811: JDK-8254158 broke ppc64, s390 builds

Changes: https://git.openjdk.java.net/jdk/pull/680/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=680&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254811
  Stats: 7 lines in 2 files changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/680.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/680/head:pull/680

PR: https://git.openjdk.java.net/jdk/pull/680