[loong64] Honor existing LASX/LSX settings

Change-Id: I1e6183b987002ed09621b111a6012a0f186233f1
Signed-off-by: Bingwu Zhang <[email protected]>

[Kaiyang Wu: backport to webkit2gtk]

Link: https://skia-review.googlesource.com/c/skia/+/948976
Signed-off-by: Kaiyang Wu <[email protected]>

Author: OriginCode

Source/ThirdParty/skia/src/opts/SkRasterPipeline_opts.h

@@ -69,7 +69,7 @@ using NoCtx = const void*;
 
 #if defined(SKRP_CPU_SCALAR) || defined(SKRP_CPU_NEON) || defined(SKRP_CPU_HSW) || \
         defined(SKRP_CPU_SKX) || defined(SKRP_CPU_AVX) || defined(SKRP_CPU_SSE41) || \
-        defined(SKRP_CPU_SSE2)
+        defined(SKRP_CPU_SSE2) || defined(SKRP_CPU_LASX) || defined(SKRP_CPU_LSX)
     // Honor the existing setting
 #elif !defined(__clang__) && !defined(__GNUC__)
     #define SKRP_CPU_SCALAR