Warnings when building sparc/leon3

[Ryan Long]

Joel and I noticed these warnings when building the leon3 BSP with 
multiprocessing enabled. Joel thinks this means that something has 
changed around the multiprocessing configuration to generate these. Does 
anybody have an idea on how to fix these?


In file included from ../../../cpukit/include/rtems.h:59,
                  from ../../../cpukit/libmisc/stackchk/check.c:28:
../../../cpukit/libmisc/stackchk/check.c: In function 
'Stack_check_report_blown_task':
../../../cpukit/include/rtems/config.h:492:5: warning: the address of 
'_MPCI_Configuration' will always evaluate as 'true' [-Waddress]
   492 |     ( &_MPCI_Configuration )
       |     ^
../../../cpukit/libmisc/stackchk/check.c:281:9: note: in expansion of 
macro 'rtems_configuration_get_user_multiprocessing_table'
   281 |     if (rtems_configuration_get_user_multiprocessing_table()) {
       |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

../../../cpukit/libmisc/monitor/mon-editor.c: In function 
'rtems_monitor_command_read':
../../../cpukit/libmisc/monitor/mon-editor.c:503:7: warning: the address 
of '_MPCI_Configuration' will always evaluate as 'true' [-Waddress]
   503 |   if (!rtems_configuration_get_user_multiprocessing_table ())