x86: rename op_helper.c to seg_helper.c

Rename what is remaining of op_helper.c to seg_helper.c.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

target-i386/Makefile.objs

-obj-y += translate.o op_helper.o helper.o cpu.o
+obj-y += translate.o helper.o cpu.o
 obj-y += excp_helper.o fpu_helper.o cc_helper.o int_helper.o svm_helper.o
-obj-y += smm_helper.o misc_helper.o mem_helper.o
+obj-y += smm_helper.o misc_helper.o mem_helper.o seg_helper.o
 obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o
 obj-$(CONFIG_KVM) += kvm.o hyperv.o
 obj-$(CONFIG_LINUX_USER) += ioport-user.o
 obj-$(CONFIG_BSD_USER) += ioport-user.o
 
-$(obj)/op_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/fpu_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/cc_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/int_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
@@ -14,3 +13,4 @@ $(obj)/svm_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/smm_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/misc_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
 $(obj)/mem_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)
+$(obj)/seg_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)