feat: power down dGPUs on hybrid graphics laptops

kernel/src/Drivers/Init.cpp

@@ -7,6 +7,7 @@
 #include "Init.hpp"
 #include <Pci/Pci.hpp>
 #include <Drivers/Graphics/IntelGPU.hpp>
+#include <Drivers/Graphics/DgpuPower.hpp>
 #include <Drivers/Net/E1000.hpp>
 #include <Drivers/Net/E1000E.hpp>
 #include <Drivers/Net/Wifi/Wifi.hpp>
@@ -222,6 +223,10 @@ namespace Drivers {
         }
     }
 
+    void PowerDownUnusedGpus() {
+        Graphics::DgpuPower::PowerDownUnused();
+    }
+
     void ProbeNormal() {
         Pci::ProbeAll(g_driverTable, g_driverTableCount, Pci::ProbePhase::Normal);
     }