core: Define HAS_NCE macro

src/core/hle/kernel/code_set.h

@@ -75,6 +75,7 @@ struct CodeSet final {
         return segments[2];
     }
 
+#ifdef HAS_NCE
     Segment& PatchSegment() {
         return patch_segment;
     }
@@ -82,13 +83,17 @@ struct CodeSet final {
     const Segment& PatchSegment() const {
         return patch_segment;
     }
+#endif
 
     /// The overall data that backs this code set.
     Kernel::PhysicalMemory memory;
 
     /// The segments that comprise this code set.
     std::array<Segment, 3> segments;
+
+#ifdef HAS_NCE
     Segment patch_segment;
+#endif
 
     /// The entry point address for this code set.
     KProcessAddress entrypoint = 0;