The CL #34967 (https://codereview.chromium.org/1804243003) and CL #35045 (https://codereview.chromium.org/1825333004)
  exposed one hidden bug in x87 turbofan code generation for Float32ToFloat64.

  This CL fixed this bug.

BUG=

Review URL: https://codereview.chromium.org/1847493002

Cr-Commit-Position: refs/heads/master@{#35129}