I’d need only a little of info to say whether we have a chance or not.
First of all search for the PCH SPI Flash controller in Device manager. It may be named differently depending on the chipset.
If it’s displayed there it’s great. Then download RWEverything and try finding the controller as one of PCI devices in RWE. If you do this miraculously, select it from the drop-down menu and make a screenshot for me.