ACPI: fix bus scanning memory leaks

Free an acpi_get_object_info() buffer when we're finished.  Skip the
acpi_get_name() altogether -- it was only used for a printk that was
really just for debug anyway.

http://bugzilla.kernel.org/show_bug.cgi?id=14271

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reported-and-tested-by: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>