amd64_edac: print debug statements only on error

Add forgotten return calls for the successful cases.
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

drivers/edac/amd64_edac.c

@@ -868,6 +868,8 @@ static void amd64_read_dbam_reg(struct amd64_pvt *pvt)
 			goto err_reg;
 	}
 
+	return;
+
 err_reg:
 	debugf0("Error reading F2x%03x.\n", reg);
 }
@@ -2634,6 +2636,8 @@ static void amd64_read_mc_registers(struct amd64_pvt *pvt)
 
 	amd64_dump_misc_regs(pvt);
 
+	return;
+
 err_reg:
 	debugf0("Reading an MC register failed\n");