hw/core: Move unconditional files to libsystem_ss, libuser_ss

Many of the headers used by these require CONFIG_USER_ONLY.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

hw/core/meson.build

@@ -26,7 +26,7 @@ system_ss.add(when: 'CONFIG_XILINX_AXI', if_true: files('stream.c'))
 system_ss.add(when: 'CONFIG_PLATFORM_BUS', if_true: files('sysbus-fdt.c'))
 system_ss.add(when: 'CONFIG_EIF', if_true: [files('eif.c'), zlib, libcbor, gnutls])
 
-system_ss.add(files(
+libsystem_ss.add(files(
   'cpu-system.c',
   'fw-path-provider.c',
   'gpio.c',
@@ -46,7 +46,7 @@ system_ss.add(files(
   'vm-change-state-handler.c',
   'clock-vmstate.c',
 ))
-user_ss.add(files(
+libuser_ss.add(files(
   'cpu-user.c',
   'qdev-user.c',
 ))