In MockSysfs, support simulating the unloading and loading of the
module. On a real system we will get uevents, "change" and "bind"
when loading and "change" and "unbind" when unloading. In terms of
udev properties the main difference is the missing DRIVER prop
after unloading. Also, and most importantly, the force_power
attribute is only present if the module is loaded.

The real uevents when UNLOADING the intel-wmi-thunderbolt module
are:

KERNEL[71760.324388] change   /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)
KERNEL[71760.324429] unbind   /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)
KERNEL[71760.324444] remove   /bus/wmi/drivers/intel-wmi-thunderbolt (drivers)
KERNEL[71760.324507] remove   /module/intel_wmi_thunderbolt (module)
UDEV  [71760.329248] change   /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)
UDEV  [71760.329301] remove   /bus/wmi/drivers/intel-wmi-thunderbolt (drivers)
UDEV  [71760.329755] remove   /module/intel_wmi_thunderbolt (module)
UDEV  [71760.330129] unbind   /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)

The `udevadm info` output, with the module unloaded:

P: /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341
E: DEVPATH=/devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341
E: DEVTYPE=method
E: MODALIAS=wmi:86CCFD48-205E-4A77-9C48-2021CBEDE341
E: SUBSYSTEM=wmi
E: WMI_GUID=86CCFD48-205E-4A77-9C48-2021CBEDE341

When LOADING the module, we get the following uevents:

KERNEL[71899.232078] add      /module/intel_wmi_thunderbolt (module)
KERNEL[71899.232152] change   /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)
KERNEL[71899.232176] bind     /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)
KERNEL[71899.232192] add      /bus/wmi/drivers/intel-wmi-thunderbolt (drivers)
UDEV  [71899.234685] add      /module/intel_wmi_thunderbolt (module)
UDEV  [71899.236107] change   /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)
UDEV  [71899.237102] add      /bus/wmi/drivers/intel-wmi-thunderbolt (drivers)
UDEV  [71899.237498] bind     /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341 (wmi)

The corresponding `udevadm info` output:

P: /devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341
E: DEVPATH=/devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/86CCFD48-205E-4A77-9C48-2021CBEDE341
E: DEVTYPE=method
E: DRIVER=intel-wmi-thunderbolt
E: MODALIAS=wmi:86CCFD48-205E-4A77-9C48-2021CBEDE341
E: SUBSYSTEM=wmi
E: WMI_GUID=86CCFD48-205E-4A77-9C48-2021CBEDE341