RFR: 8309044: Replace NULL with nullptr, final sweep of hotspot code [v2]

[Johan Sjölen]

> A final sweep of Hotspot to remove all re-added NULLs. With only 110 changes I'd appreciate if this was considered trivial.

Johan Sjölen has updated the pull request incrementally with two additional commits since the last revision:

 - Align
 - Suggestions

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14198/files
  - new: https://git.openjdk.org/jdk/pull/14198/files/c7e28571..c9d9c30c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14198&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14198&range=00-01

  Stats: 9 lines in 8 files changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/14198.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14198/head:pull/14198

PR: https://git.openjdk.org/jdk/pull/14198