mfd: lpc_ich: Add PCI ID for Intel Cougar Mountain SoC

This patches adds the first minimal support to the upstream Linux tree.

Signed-off-by: Priyalee Kushwaha <priyalee.kushwaha@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>