RFR: 8293856: AArch64: Remove clear_inst_mark from aarch64_enc_java_dynamic_call

[Hao Sun]

1) After the fix of JDK-8287394, there is no need for clear_inst_mark after trampoline_call. See the discussion in [1].

2) MacroAssembler::ic_call has trampoline_call as the last call.

Hence, clear_inst_mark after MacroAssembler::ic_call can be removed. There is such a case in aarch64_enc_java_dynamic_call. We conduct the cleanup in this patch.

Testing: tier1~3 passed with no new failures on Linux/AArch64 platform.

[1] https://github.com/openjdk/jdk/pull/8564#discussion_r871062342

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Commit messages:
 - 8293856: AArch64: Remove clear_inst_mark from aarch64_enc_java_dynamic_call

Changes: https://git.openjdk.org/jdk/pull/11200/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11200&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293856
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11200.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11200/head:pull/11200

PR: https://git.openjdk.org/jdk/pull/11200