Kernel: Remove usage of adopt_own in MultiProcessorParser

Author: https://github.com/bgianfo
Commit: https://github.com/SerenityOS/serenity/commit/32f96eb937b
Pull-request: https://github.com/SerenityOS/serenity/pull/7520
Reviewed-by: https://github.com/supercomputer7

Kernel/ACPI/MultiProcessorParser.cpp

@@ -21,7 +21,9 @@ UNMAP_AFTER_INIT OwnPtr<MultiProcessorParser> MultiProcessorParser::autodetect()
     auto floating_pointer = find_floating_pointer();
     if (!floating_pointer.has_value())
         return {};
-    return adopt_own(*new MultiProcessorParser(floating_pointer.value()));
+    auto parser = adopt_own_if_nonnull(new MultiProcessorParser(floating_pointer.value()));
+    VERIFY(parser != nullptr);
+    return parser;
 }
 
 UNMAP_AFTER_INIT MultiProcessorParser::MultiProcessorParser(PhysicalAddress floating_pointer)