Re-enable fast stepping for arm targets.  The issue being worked
around was fixed in llvm commit r186846.
<rdar://problem/14489274> 


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@187620 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Target/ThreadPlanStepRange.cpp b/source/Target/ThreadPlanStepRange.cpp
index da25348..3940d54 100644
--- a/source/Target/ThreadPlanStepRange.cpp
+++ b/source/Target/ThreadPlanStepRange.cpp
@@ -54,11 +54,7 @@
     m_first_run_event (true),
     m_use_fast_step(false)
 {
-    llvm::Triple::ArchType arch_type = GetTarget().GetArchitecture().GetMachine();
-    if (arch_type == llvm::Triple::arm || arch_type == llvm::Triple::thumb)
-        m_use_fast_step = false;
-    else
-        m_use_fast_step = GetTarget().GetUseFastStepping();
+    m_use_fast_step = GetTarget().GetUseFastStepping();
     AddRange(range);
     m_stack_id = m_thread.GetStackFrameAtIndex(0)->GetStackID();
 }