Add "void" to empty function param list

Fix compiler warnings by changing "()" to "(void)" in some function
definitions.

Signed-off-by: Jeff Squyres <jeff@squyres.com>

Author: jsquyres

opal/mca/btl/template/btl_template_component.c

@@ -14,6 +14,7 @@
  *                         reserved.
  * Copyright (c) 2020      Amazon.com, Inc. or its affiliates.
  *                         All Rights reserved.
+ * Copyright (c) 2023      Jeffrey M. Squyres.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -143,7 +144,7 @@ mca_btl_base_module_t **mca_btl_template_component_init(int *num_btl_modules,
  *  TEMPLATE component progress.
  */
 
-int mca_btl_template_component_progress()
+int mca_btl_template_component_progress(void)
 {
     return 0;
 }

opal/runtime/opal_info_support.c

@@ -20,6 +20,7 @@
  * Copyright (c) 2021      Nanook Consulting.  All rights reserved.
  * Copyright (c) 2022      Computer Architecture and VLSI Systems (CARV)
  *                         Laboratory, ICS Forth. All rights reserved.
+ * Copyright (c) 2023      Jeffrey M. Squyres.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -842,12 +843,12 @@ void opal_info_show_mca_params(const char *type, const char *component,
     }
 }
 
-void opal_info_do_arch()
+void opal_info_do_arch(void)
 {
     opal_info_out("Configured architecture", "config:arch", OPAL_ARCH);
 }
 
-void opal_info_do_hostname()
+void opal_info_do_hostname(void)
 {
     opal_info_out("Configure host", "config:host", OPAL_CONFIGURE_HOST);
 }