Enable midthread preemption after the setup is completed

previous:
enable midthread preemption
<...>
csr base
<...>
pipe control + debug control 2
pipe control + VFE state

after:
<...>
csr base
<...>
pipe control + debug control 2
pipe control + VFE state
enable midthread preemption

This is to avoid a race condition and prevent midthread
preemption until the setup is completed.

Change-Id: Icfc1fc839f89e7c51d8e760e544839639fd7d983
Signed-off-by: James Xiong <james.xiong@intel.com>

Author: jamesxio

runtime/command_stream/command_stream_receiver_hw_base.inl

@@ -259,7 +259,6 @@ CompletionStamp CommandStreamReceiverHw<GfxFamily>::flushTask(
     }
 
     initPageTableManagerRegisters(commandStreamCSR);
-    programPreemption(commandStreamCSR, dispatchFlags);
     programComputeMode(commandStreamCSR, dispatchFlags);
     programL3(commandStreamCSR, dispatchFlags, newL3Config);
     programPipelineSelect(commandStreamCSR, dispatchFlags.pipelineSelectArgs);
@@ -275,6 +274,8 @@ CompletionStamp CommandStreamReceiverHw<GfxFamily>::flushTask(
 
     programVFEState(commandStreamCSR, dispatchFlags, device.getDeviceInfo().maxFrontEndThreads);
 
+    programPreemption(commandStreamCSR, dispatchFlags);
+
     bool dshDirty = dshState.updateAndCheck(&dsh);
     bool iohDirty = iohState.updateAndCheck(&ioh);
     bool sshDirty = sshState.updateAndCheck(&ssh);