x86_cpu_model: add case to test EPYC-Rome cpu model

Signed-off-by: NYumei Huang <yuhuang@redhat.com>

qemu/tests/cfg/x86_cpu_model.cfg

@@ -17,6 +17,9 @@
             cpu_model = host
             start_vm = yes
             cpu_model_flags += ",check"
+        - EPYC-Rome:
+            flags = "movbe rdrand rdtscp fxsr_opt cr8_legacy osvw fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 arat f16c xsaveerptr clzero rdpid perfctr_core ibpb wbnoinvd stibp clwb umip xsaves"
+            model_pattern = "AMD EPYC-Rome Processor%s"
         - EPYC:
             flags = "movbe rdrand rdtscp fxsr_opt cr8_legacy osvw fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 arat f16c"
             model_pattern = "AMD EPYC Processor%s"