commit dcb5d8dbac0cd2056de66cf1e29b8503ed6853dd fixes an unbalanced
CONFIG_ACPI_PROCFS code block during module initialisation. This
patch fixes similar issue but for the module exit.
Signed-off-by: Luis Henriques <luis.henrix@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>