Updated Container hotplug error messages with acpi_handle_<level>()
and pr_<level>().  Removed an unnecessary check to the device arg
in acpi_container_add().
Signed-off-by: NToshi Kani <toshi.kani@hp.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>