learning-gem5,tests: Fix 'valid_isas' in learning gem5 part 3

This was set to 'gcn3_x86_tag'. We only do this for quick X86 tests (to
minimize the build targets during the quick tests). This is not
necessary for the long tests.

Change-Id: I3bd20b53e04d129462e6f62a24f34b093f4a1b80
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/59011
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/tests/gem5/learning_gem5/part3_test.py b/tests/gem5/learning_gem5/part3_test.py
index 249951b..ad9ea8d 100644
--- a/tests/gem5/learning_gem5/part3_test.py
+++ b/tests/gem5/learning_gem5/part3_test.py
@@ -40,9 +40,9 @@
     config_args = [],
     protocol = 'MSI',
     # Currently only x86 has the threads test
-    valid_isas=(constants.gcn3_x86_tag,),
+    valid_isas=(constants.x86_tag,),
     # dynamically linked
-    valid_hosts=constants.target_host[constants.gcn3_x86_tag],
+    valid_hosts=constants.target_host[constants.x86_tag],
     length=constants.long_tag,
 )
 
@@ -53,6 +53,6 @@
     config_args = [],
     protocol = 'MSI',
     # Currently only x86 has the threads test
-    valid_isas=(constants.gcn3_x86_tag,),
+    valid_isas=(constants.x86_tag,),
     length=constants.long_tag,
 )