First of all, the HM87 is your 8-Series Mobile chipset and it supports your 4th generation Mobile Intel processor. The LPC (Low Pin Count) bus is a legacy bus that is used to connect devices such as Super I/O ICs, TPMs, etc. The controller for this bus is located in the chipset (in the Platform Controller Hub (PCH) IC that comprises this chipset). What you have done is update the configuration of the driver that supports this LPC bus controller.
Hope this helps,