[D3D12] Emulate reversed Z in shaders because it's unsupported on Nvidia

src/xenia/gpu/d3d12/shaders/xenos_draw.hlsli

@@ -3,20 +3,20 @@
 
 cbuffer xe_system_cbuffer : register(b0) {
   // vec4 0
-  uint3 xe_vertex_w_format;
+  uint xe_vertex_index_endian;
   uint xe_vertex_base_index;
+  uint xe_ndc_control;
+  uint xe_pixel_pos_reg;
   // vec4 1
   float3 xe_ndc_scale;
-  uint xe_vertex_index_endian;
+  float xe_pixel_half_pixel_offset;
   // vec4 2
   float3 xe_ndc_offset;
-  float xe_pixel_half_pixel_offset;
+  int xe_alpha_test;
   // vec4 3
   float2 xe_point_size;
   float2 xe_ssaa_inv_scale;
   // vec4 4
-  uint xe_pixel_pos_reg;
-  int xe_alpha_test;
   float2 xe_alpha_test_range;
   // vec4 5
   float4 xe_color_exp_bias;