xe: jit: conv_v2: fix duplicate access specifier

Author: atkassen

src/gpu/intel/jit/v2/conv/plan_registry.hpp

@@ -55,7 +55,7 @@ class plan_registry_t {
     void stringify(std::ostream &out) const;
     void parse(std::istream &out);
 
-public:
+private:
     std::vector<entry_t> entries_;
 };