Revert of Revert of SSE4 opaque blend using intrinsics instead of assembly.

src/opts/opts_check_x86.cpp

Index: src/opts/opts_check_x86.cpp
diff --git a/src/opts/opts_check_x86.cpp b/src/opts/opts_check_x86.cpp
index 71107d8756f9f27436e0570bf576c86b5e74da0a..84a4913021bb7b60057f18f8305f639ca725dcf0 100644
--- a/src/opts/opts_check_x86.cpp
+++ b/src/opts/opts_check_x86.cpp
@@ -227,21 +227,17 @@
     S32A_Blend_BlitRow32_SSE2,          // S32A_Blend,
 };
 
-#if defined(SK_ATT_ASM_SUPPORTED)
 static SkBlitRow::Proc32 platform_32_procs_SSE4[] = {
     NULL,                               // S32_Opaque,
     S32_Blend_BlitRow32_SSE2,           // S32_Blend,
-    S32A_Opaque_BlitRow32_SSE4_asm,     // S32A_Opaque
+    S32A_Opaque_BlitRow32_SSE4,         // S32A_Opaque
     S32A_Blend_BlitRow32_SSE2,          // S32A_Blend,
 };
-#endif
 
 SkBlitRow::Proc32 SkBlitRow::PlatformProcs32(unsigned flags) {
-#if defined(SK_ATT_ASM_SUPPORTED)
     if (supports_simd(SK_CPU_SSE_LEVEL_SSE41)) {
         return platform_32_procs_SSE4[flags];
     } else
-#endif
     if (supports_simd(SK_CPU_SSE_LEVEL_SSE2)) {
         return platform_32_procs_SSE2[flags];
     } else {