Update to 3.18-rc2.
    - Config changes:
      * ACPI_THERMAL_REL=m
      * DA9063_WATCHDOG=m
      * INT340X_THERMAL=m
      * OVERLAYFS_FS=m (vanilla only, we've been carrying these patches)
      * PWM_LPSS_PCI=m
      * PWM_LPSS_PLATFORM=m
      * TCM_USER=m
      * THERMAL_GOV_BANG_BANG=y