[master] RFR: 8301545: [Lilliput] Fix aarch64 interpreter load_nklass()

[Roman Kennke]

In #66 I made a mistake in a last-minute change and GHA hasn't caught it: I got a condition wrong. Let's fix it.

Testing:
 - [x] tier1
 - [ ] tier2

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Commit messages:
 - 8301545: [Lilliput] Fix aarch64 interpreter load_nklass()

Changes: https://git.openjdk.org/lilliput/pull/68/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=68&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301545
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/lilliput/pull/68.diff
  Fetch: git fetch https://git.openjdk.org/lilliput pull/68/head:pull/68

PR: https://git.openjdk.org/lilliput/pull/68