This CL makes sure the offset is calculated correctly to be
the return address from a C Function. Checking the size
of generated code is also fixed to take into account the extra
instruction we have from LoadPC.

Change-Id: I585c11efbe4342bc5a0d3068683b54cb563a3bc5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3257206Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#77666}