EEVEE: Fix unreported broken normal map node modes

A compilation error was making it impossible to use normal map modes other
than tangent.

source/blender/gpu/shaders/material/gpu_shader_material_normal_map.glsl

@@ -1,3 +1,5 @@
+
+#ifdef OBINFO_LIB
 void node_normal_map(vec4 tangent, vec3 texnormal, out vec3 outnormal)
 {
   if (all(equal(tangent, vec4(0.0, 0.0, 0.0, 1.0)))) {
@@ -10,6 +12,7 @@ void node_normal_map(vec4 tangent, vec3 texnormal, out vec3 outnormal)
   outnormal = texnormal.x * tangent.xyz + texnormal.y * B + texnormal.z * g_data.N;
   outnormal = normalize(outnormal);
 }
+#endif
 
 void color_to_normal_new_shading(vec3 color, out vec3 normal)
 {