Only enable HIP for Vega20 on non-ROCm platforms

SWDEV-245906

All asics will still be supported for developer builds.

Change-Id: I0eac2246162d133fe63449c200d996fe05bd51bd

rocclr/device/pal/paldevice.cpp

@@ -296,6 +296,11 @@ bool NullDevice::init() {
 
 bool NullDevice::create(Pal::AsicRevision asicRevision, Pal::GfxIpLevel ipLevel,
                         uint xNACKSupported) {
+  if (IS_HIP && IS_MAINLINE &&
+      (asicRevision != Pal::AsicRevision::Vega20)) {
+    return false;
+  }
+
   online_ = false;
   Pal::DeviceProperties properties = {};