RFR: 8291953: Remove PTR32_FORMAT macros

[Kim Barrett]

Please review this change to remove the PTR32_FORMAT macro.

And the idea of hard-coded 32bit pointers is bad; we already have the
PTR_FORMAT macros that deal with the 32/64bit distinction for pointers, and
those should be used for such.

However, all uses of PTR32_FORMAT are actually with values that are real uint
values, not (converted) pointers. They should just use "%u" instead.  So we
can eliminate PTR32_FORMAT.

The unused PTR32_FORMAT_W is is also removed.

Testing:
mach5 tier1

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Commit messages:
 - remove PTR32_FORMAT

Changes: https://git.openjdk.org/jdk/pull/9768/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9768&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291953
  Stats: 12 lines in 3 files changed: 0 ins; 3 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/9768.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9768/head:pull/9768

PR: https://git.openjdk.org/jdk/pull/9768