Add support for System76 branded laptops, or at least add parameter allow model override

[jspenguin]

Most of the laptops sold by System76 are based on Clevo models. I have an Oryx Pro 3, which is based on the P650HP. I was able to get the module working by adding the following to the DMI table:

{
    .ident = "System76 Oryx Pro",
    .matches = {
        DMI_MATCH(DMI_PRODUCT_NAME, "Oryx Pro"),
        DMI_MATCH(DMI_PRODUCT_VERSION, "oryp3"),
    },
    .callback = clevo_xsm_dmi_matched,
    .driver_data = &kb_full_color_ops,
},

It would help if there were a parameter to override the model, because I could clearly read the original model number from the sticker on the back.