intel: Remove unnecessary dualBlendMode enable

bug #12925
header version: r29511
Can determine dualBlendModeEnable from blend information provided.
Integrate review feedback.
diff --git a/icd/intel/cmd_pipeline.c b/icd/intel/cmd_pipeline.c
index 6e211a2..e2cdafc 100644
--- a/icd/intel/cmd_pipeline.c
+++ b/icd/intel/cmd_pipeline.c
@@ -585,7 +585,7 @@
     if (fs->uses & INTEL_SHADER_USE_W)
         dw5 |= GEN6_WM_DW5_PS_USE_W;
 
-    if (pipeline->cb_state.dualSourceBlendEnable)
+    if (pipeline->dual_source_blend_enable)
         dw5 |= GEN6_WM_DW5_DUAL_SOURCE_BLEND;
 
     dw6 = fs->in_count << GEN6_WM_DW6_SF_ATTR_COUNT__SHIFT |
@@ -689,7 +689,7 @@
     if (fs->in_count)
         dw4 |= GEN7_PS_DW4_ATTR_ENABLE;
 
-    if (pipeline->cb_state.dualSourceBlendEnable)
+    if (pipeline->dual_source_blend_enable)
         dw4 |= GEN7_PS_DW4_DUAL_SOURCE_BLEND;
 
     dw5 = fs->urb_grf_start << GEN7_PS_DW5_URB_GRF_START0__SHIFT |