target/i386/cpu: Merge the warning and error messages for AMD HT check

Currently, the difference between warn_report_once() and
error_report_once() is the former has the "warning:" prefix, while the
latter does not have a similar level prefix.

At the meantime, considering that there is no error handling logic here,
and the purpose of error_report_once() is only to prompt the user with
an abnormal message, there is no need to use an error-level message here,
and instead we can just use a warning.

Therefore, downgrade the message in error_report_once() to warning, and
merge it into the previous warn_report_once().

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <20240327103951.3853425-4-zhao1.liu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 2845298..fd6af0d 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -7611,9 +7611,9 @@
         !(env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_TOPOEXT) &&
         cs->nr_threads > 1) {
             warn_report_once("This family of AMD CPU doesn't support "
-                             "hyperthreading(%d).", cs->nr_threads);
-            error_report_once("Please configure -smp options properly"
-                              " or try enabling topoext feature.");
+                             "hyperthreading(%d). Please configure -smp "
+                             "options properly or try enabling topoext "
+                             "feature.", cs->nr_threads);
     }
 
 #ifndef CONFIG_USER_ONLY