First of all, I tried with VMM enabled, but my config doesn't even boot with VMM, so NOT USING VMM in my case.
Dropped 
AGPM-Override.kext to \EFI\OC\Kexts on my OC (EFI) partition.
Added the following to config.plist as the last DICT section in Kernel key (below FeatureUnlock.kext in my case):
	
	
	
		Code:
	
	
		<dict>
                <key>Arch</key>
                <string>x86_64</string>
                <key>BundlePath</key>
                <string>ASPP-Override.kext</string>
                <key>Comment</key>
                <string>ACPI_SMC_PlatformPlugin Override</string>
                <key>Enabled</key>
                <true/>
                <key>ExecutablePath</key>
                <string></string>
                <key>MaxKernel</key>
                <string></string>
                <key>MinKernel</key>
                <string>21.4.0</string>
                <key>PlistPath</key>
                <string>Contents/Info.plist</string>
</dict>
	 
 
Rebooted and applied the update. Worked automatically, most probably because I got:
	
	
	
		Code:
	
	
		<key>ProtocolOverrides</key>
        <dict>
            <key>AppleBootPolicy</key>
            <true/>
	 
 and
	
	
	
		Code:
	
	
		<key>Quirks</key>
        <dict>
            <key>RequestBootVarRouting</key>
            <true/>
	 
 
...however I believe most people do anyway.