Revert "Detect cache line size on Linux for PPC hosts."

src/ppc/assembler-ppc.cc

Index: src/ppc/assembler-ppc.cc
diff --git a/src/ppc/assembler-ppc.cc b/src/ppc/assembler-ppc.cc
index b70af66b014f9024546ee9cfc084d51a55f8087e..793209343cd5edbdd84b97bf57027c78a84b7b06 100644
--- a/src/ppc/assembler-ppc.cc
+++ b/src/ppc/assembler-ppc.cc
@@ -55,7 +55,7 @@ static unsigned CpuFeaturesImpliedByCompiler() {
 
 void CpuFeatures::ProbeImpl(bool cross_compile) {
   supported_ |= CpuFeaturesImpliedByCompiler();
-  icache_line_size_ = 128;
+  cache_line_size_ = 128;
 
   // Only use statically determined features for cross compile (snapshot).
   if (cross_compile) return;
@@ -85,9 +85,6 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
     // Assume support
     supported_ |= (1u << FPU);
   }
-  if (cpu.icache_line_size() != base::CPU::UNKNOWN_CACHE_LINE_SIZE) {
-    icache_line_size_ = cpu.icache_line_size();
-  }
 #elif V8_OS_AIX
   // Assume support FP support and default cache line size
   supported_ |= (1u << FPU);