target/s390x: start moving TCG-only code to tcg/

move everything related to translate, as well as HELPER code in tcg/

mmu_helper.c stays put for now, as it contains both TCG and KVM code.

After the reshuffling, update MAINTAINERS accordingly.
Make use of the new directory:

target/s390x/tcg/

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Cho, Yu-Chen <acho@suse.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210707105324.23400-8-acho@suse.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
diff --git a/target/s390x/meson.build b/target/s390x/meson.build
index a5e1ded..60d7f1b 100644
--- a/target/s390x/meson.build
+++ b/target/s390x/meson.build
@@ -8,21 +8,6 @@
   'interrupt.c',
 ))
 
-s390x_ss.add(when: 'CONFIG_TCG', if_true: files(
-  'cc_helper.c',
-  'crypto_helper.c',
-  'excp_helper.c',
-  'fpu_helper.c',
-  'int_helper.c',
-  'mem_helper.c',
-  'misc_helper.c',
-  'translate.c',
-  'vec_fpu_helper.c',
-  'vec_helper.c',
-  'vec_int_helper.c',
-  'vec_string_helper.c',
-))
-
 s390x_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'), if_false: files('kvm-stub.c'))
 
 gen_features = executable('gen-features', 'gen-features.c', native: true,
@@ -60,6 +45,8 @@
 
 s390x_user_ss = ss.source_set()
 
+subdir('tcg')
+
 target_arch += {'s390x': s390x_ss}
 target_softmmu_arch += {'s390x': s390x_softmmu_ss}
 target_user_arch += {'s390x': s390x_user_ss}