Kernel: Make Region.cpp compile on aarch64

Author: https://github.com/jamesmintram
Commit: 627fd231d5
Pull-request: https://github.com/SerenityOS/serenity/pull/13447

Kernel/Arch/x86/Processor.h

@@ -397,6 +397,16 @@ public:
 
     static void deferred_call_queue(Function<void()> callback);
 
+    ALWAYS_INLINE bool has_nx() const
+    {
+        return has_feature(CPUFeature::NX);
+    }
+
+    ALWAYS_INLINE bool has_pat() const
+    {
+        return has_feature(CPUFeature::PAT);
+    }
+
     ALWAYS_INLINE bool has_feature(CPUFeature::Type const& feature) const
     {
         return m_features.has_flag(feature);