Kernel: Fix AML PCIConfig OpRegion accesses

Apparently I'm not supposted to calculate device/function from the
offset, but parse them from the acpi namespace :)

This allows PCI PIN interrupt routing actually work

kernel/include/kernel/ACPI/AML/Node.h

@@ -87,6 +87,12 @@ namespace Kernel::ACPI::AML
 	struct OpRegion
 	{
 		GAS::AddressSpaceID address_space;
+
+		uint16_t seg;
+		uint8_t bus;
+		uint8_t dev;
+		uint8_t func;
+
 		uint64_t offset;
 		uint64_t length;
 	};