nir_types: add glsl_atomic_uint_type() helper

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/compiler/nir_types.cpp

@@ -533,3 +533,9 @@ glsl_get_natural_size_align_bytes(const struct glsl_type *type,
       unreachable("type does not have a natural size");
    }
 }
+
+const glsl_type *
+glsl_atomic_uint_type(void)
+{
+   return glsl_type::atomic_uint_type;
+}

src/compiler/nir_types.h

@@ -190,6 +190,8 @@ typedef void (*glsl_type_size_align_func)(const struct glsl_type *type,
 void glsl_get_natural_size_align_bytes(const struct glsl_type *type,
                                        unsigned *size, unsigned *align);
 
+const struct glsl_type *glsl_atomic_uint_type(void);
+
 #ifdef __cplusplus
 }
 #endif