[lilliput-jdk17u:lilliput] RFR: 8312095: [Lilliput/JDK17] Reinstate use of BiasedLockingCounters [v2]

[Roman Kennke]

> In x86_64.ad we accidentally dropped _counters to NULL in a fast_lock() call. This means we're not counting BiasedLocking calls correctly. Let's fix that. It is only relevant in 17 because biased locking has been removed in later release.
> 
> Testing:
>  - [ ] tier1 +UseBiasedLocking

Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:

  x86_32.ad fix

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Changes:
  - all: https://git.openjdk.org/lilliput-jdk17u/pull/52/files
  - new: https://git.openjdk.org/lilliput-jdk17u/pull/52/files/8c94c90b..27f63a24

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=52&range=01
 - incr: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=52&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/lilliput-jdk17u/pull/52.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk17u.git pull/52/head:pull/52

PR: https://git.openjdk.org/lilliput-jdk17u/pull/52