EDAC, MCE, AMD: Simplify NB MCE decoder interface

Drop third nbcfg argument which is old remains and not required anymore.

No functionality change.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 9a8bebc..9bf0b62 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1953,11 +1953,9 @@
 		amd64_handle_ue(mci, m);
 }
 
-void amd64_decode_bus_error(int node_id, struct mce *m, u32 nbcfg)
+void amd64_decode_bus_error(int node_id, struct mce *m)
 {
-	struct mem_ctl_info *mci = mcis[node_id];
-
-	__amd64_decode_bus_error(mci, m);
+	__amd64_decode_bus_error(mcis[node_id], m);
 }
 
 /*