VM: Re-format to use at most one newline between functions

runtime/vm/cpu_arm64.cc

Index: runtime/vm/cpu_arm64.cc
diff --git a/runtime/vm/cpu_arm64.cc b/runtime/vm/cpu_arm64.cc
index 290d90da6408110495d76480423343a59a4320ae..0c089aeff0960e05640e42fb8f46da06fb9f20a4 100644
--- a/runtime/vm/cpu_arm64.cc
+++ b/runtime/vm/cpu_arm64.cc
@@ -15,7 +15,7 @@
 #if !defined(HOST_OS_FUCHSIA)
 #include <sys/syscall.h> /* NOLINT */
 #endif
-#include <unistd.h>      /* NOLINT */
+#include <unistd.h> /* NOLINT */
 #endif
 
 namespace dart {
@@ -47,7 +47,6 @@ void CPU::FlushICache(uword start, uword size) {
 #endif
 }
 
-
 const char* CPU::Id() {
   return
 #if defined(USING_SIMULATOR)
@@ -56,13 +55,11 @@ const char* CPU::Id() {
       "arm64";
 }
 
-
 const char* HostCPUFeatures::hardware_ = NULL;
 #if defined(DEBUG)
 bool HostCPUFeatures::initialized_ = false;
 #endif
 
-
 #if !defined(USING_SIMULATOR)
 void HostCPUFeatures::InitOnce() {
   CpuInfo::InitOnce();
@@ -72,7 +69,6 @@ void HostCPUFeatures::InitOnce() {
 #endif
 }
 
-
 void HostCPUFeatures::Cleanup() {
   DEBUG_ASSERT(initialized_);
 #if defined(DEBUG)
@@ -94,7 +90,6 @@ void HostCPUFeatures::InitOnce() {
 #endif
 }
 
-
 void HostCPUFeatures::Cleanup() {
   DEBUG_ASSERT(initialized_);
 #if defined(DEBUG)