target-s390x: split memory access helpers

Move memory access helpers to mem_helper.c.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
[agraf: fold softmmu include ifdefs together]
Signed-off-by: NAlexander Graf <agraf@suse.de>

target-s390x/Makefile.objs

 obj-y += translate.o op_helper.o helper.o cpu.o interrupt.o
-obj-y += int_helper.o fpu_helper.o cc_helper.o
+obj-y += int_helper.o fpu_helper.o cc_helper.o mem_helper.o
 obj-$(CONFIG_SOFTMMU) += machine.o
 obj-$(CONFIG_KVM) += kvm.o
 
@@ -7,3 +7,4 @@ $(obj)/op_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/int_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/fpu_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/cc_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
+$(obj)/mem_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)