RFR: 8285945: [BACKOUT] JDK-8285802 AArch64: Consistently handle offsets in MacroAssembler as 64-bit quantities

[Daniel D.Daugherty]

This reverts commit df4d5cf5f53c1451487e6301d31c196fac029f7a.

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Commit messages:
 - 8285945: [BACKOUT] JDK-8285802 AArch64: Consistently handle offsets in MacroAssembler as 64-bit quantities

Changes: https://git.openjdk.java.net/jdk/pull/8472/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8472&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285945
  Stats: 13 lines in 3 files changed: 0 ins; 0 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8472.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8472/head:pull/8472

PR: https://git.openjdk.java.net/jdk/pull/8472