hw/core: Move numa.c into the target independent source set

There is nothing that depends on target specific macros in this
file, so we can move it to the common source set to avoid that
we have to compile this file multiple times (one time for each
target).

Message-Id: <20230413182636.139356-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/core/meson.build

@@ -44,6 +44,7 @@ softmmu_ss.add(files(
   'machine.c',
   'nmi.c',
   'null-machine.c',
+  'numa.c',
   'qdev-fw.c',
   'qdev-properties-system.c',
   'sysbus.c',
@@ -53,5 +54,4 @@ softmmu_ss.add(files(
 
 specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: files(
   'machine-qmp-cmds.c',
-  'numa.c',
 ))