fixup! hle: kernel: Migrate KReadableEvent and KWritableEvent to KAutoObject.

src/core/hle/kernel/k_readable_event.h

@@ -27,7 +27,7 @@ public:
         name = std::move(name_);
     }
 
-    constexpr KEvent* GetParent() const {
+    KEvent* GetParent() const {
         return parent;
     }
 

src/core/hle/kernel/k_writable_event.h

@@ -29,7 +29,7 @@ public:
     ResultCode Signal();
     ResultCode Clear();
 
-    constexpr KEvent* GetParent() const {
+    KEvent* GetParent() const {
         return parent;
     }