Revert "ppc: well form kvmppc_hint_smt_possible error hint helper"

This reverts commit cdcca22aabafc0496894ce05c80097684832c7d9.

Commit cdcca22aaba is a superseded version of the next commit that
crept in by accident.  Revert it, so the final version applies.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 7406d18..c77f984 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2076,7 +2076,7 @@
     return ret;
 }
 
-void kvmppc_error_append_smt_possible_hint(Error **errp_in)
+void kvmppc_hint_smt_possible(Error **errp)
 {
     int i;
     GString *g;
@@ -2091,10 +2091,10 @@
             }
         }
         s = g_string_free(g, false);
-        error_append_hint(errp_in, "%s.\n", s);
+        error_append_hint(errp, "%s.\n", s);
         g_free(s);
     } else {
-        error_append_hint(errp_in,
+        error_append_hint(errp,
                           "This KVM seems to be too old to support VSMT.\n");
     }
 }