[PAL] Allow overriding reported asic revision

This is helpfull to do when debugging issues on lowend asics. Navi14 can be emulated as Navi10. So can Navi22 be emulated as Navi21.

Change-Id: I693ffd45a5b03657822afdc872781901bc69b65c

rocclr/device/pal/paldevice.cpp

@@ -922,7 +922,9 @@ bool Device::create(Pal::IDevice* device) {
 
   // Save the IP level for the offline detection
   ipLevel_ = properties().gfxLevel;
-  asicRevision_ = properties().revision;
+  asicRevision_ = flagIsDefault(PAL_FORCE_ASIC_REVISION) ?
+                  properties().revision :
+                  static_cast<Pal::AsicRevision>(PAL_FORCE_ASIC_REVISION);
 
   // XNACK flag should be set for  PageMigration | IOMMUv2 Support
   // Note: Navi2x should have a fix in HW