rsx: Fix depth clipping

- Fix special case where n=f making (f-n) = 0
- Dynamically update depth range by setting dirty bits
- Fix depth bounds when n=f and bounds test is disabled

rpcs3/Emu/RSX/GL/GLDraw.cpp

@@ -257,15 +257,15 @@ void GLGSRender::update_draw_state()
 	//NV4097_SET_TWO_SIDE_LIGHT_EN
 	//NV4097_SET_FLAT_SHADE_OP
 	//NV4097_SET_EDGE_FLAG
-
-
-
 	//NV4097_SET_COLOR_KEY_COLOR
 	//NV4097_SET_SHADER_CONTROL
 	//NV4097_SET_ZMIN_MAX_CONTROL
 	//NV4097_SET_ANTI_ALIASING_CONTROL
 	//NV4097_SET_CLIP_ID_TEST_ENABLE
 
+	// For OGL Z range is updated every draw as it is separate from viewport config
+	m_graphics_state &= ~(rsx::pipeline_state::zclip_config_state_dirty);
+
 	m_frame_stats.setup_time += m_profiler.duration();
 }