Add new regkey to disable DispatchAlongY for HW IDs

Change-Id: I1c53b9ae8fe26df111ccd3219a9ca9448473bfdb

Author: iwwu

IGC/common/igc_flags.def

@@ -371,6 +371,7 @@ DECLARE_IGC_REGKEY(bool, disableRemat,                  false, "disable re-mater
 DECLARE_IGC_REGKEY(bool, EnableDisableMidThreadPreemptionOpt, true, "Disable mid thread preemption", false)
 DECLARE_IGC_REGKEY(DWORD, MidThreadPreemptionDisableThreshold, 600, "Threshold to disable mid thread preemption", false)
 DECLARE_IGC_REGKEY(bool, DispatchGPGPUWalkerAlongYFirst, true, "dispatch GPGPU walker along Y first", false)
+DECLARE_IGC_REGKEY(bool, DisableYWalkOnHWid,            true, "disable DispatchGPGPUWalkerAlongYFirst on HW generated local IDs", false)
 DECLARE_IGC_REGKEY(bool, SetMaxPreRASchedulerRegPressureThreshold, false,  "set Max PreRA Scheduler Threshold", false)
 DECLARE_IGC_REGKEY(bool, LimitConstantBuffersPushed,    true, "Limit max number of CBs pushed when SupportIndirectConstantBuffer is true", false)
 DECLARE_IGC_REGKEY(DWORD, MaxPreRASchedulerRegPressureThreshold, 60,  "Max PreRA Scheduler Threshold", false)