ACPI: processor: clean up in acpi_processor_start() error exits

We used to leave crud around if things failed in acpi_processor_start().
This patch cleans up as much as we can before returning.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reviewed-by: Alex Chiang <achiang@hp.com>
CC: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
CC: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>