x86: sort obj-<...> list of main Makefile

It is mostly sorted, but there are anomalies. Eliminating them gives
people fewer excuses to (blindly) add to the end of the list.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

xen/arch/x86/Makefile

@@ -33,21 +33,22 @@ obj-y += emul-i8254.o
 obj-y += extable.o
 obj-y += flushtlb.o
 obj-$(CONFIG_GDBSX) += gdbsx.o
+obj-y += hpet.o
 obj-y += hypercall.o
 obj-y += i387.o
 obj-y += i8259.o
-obj-y += io_apic.o
-obj-$(CONFIG_LIVEPATCH) += livepatch.o
-obj-y += msi.o
-obj-y += msr.o
 obj-$(CONFIG_INDIRECT_THUNK) += indirect-thunk.o
 obj-$(CONFIG_RETURN_THUNK) += indirect-thunk.o
 obj-$(CONFIG_PV) += ioport_emulate.o
+obj-y += io_apic.o
 obj-y += irq.o
+obj-$(CONFIG_LIVEPATCH) += livepatch.o
 obj-$(CONFIG_KEXEC) += machine_kexec.o
 obj-y += mm.o x86_64/mm.o
 obj-$(CONFIG_VM_EVENT) += monitor.o
 obj-y += mpparse.o
+obj-y += msi.o
+obj-y += msr.o
 obj-y += nmi.o
 obj-y += numa.o
 obj-y += pci.o
@@ -62,14 +63,13 @@ obj-y += spec_ctrl.o
 obj-y += srat.o
 obj-y += string.o
 obj-$(CONFIG_SYSCTL) += sysctl.o
+obj-$(CONFIG_TBOOT) += tboot.o
 obj-y += time.o
 obj-y += traps-setup.o
 obj-y += traps.o
 obj-$(CONFIG_INTEL) += tsx.o
-obj-y += x86_emulate.o
-obj-$(CONFIG_TBOOT) += tboot.o
-obj-y += hpet.o
 obj-$(CONFIG_VM_EVENT) += vm_event.o
+obj-y += x86_emulate.o
 obj-y += xstate.o
 
 ifneq ($(CONFIG_PV_SHIM_EXCLUSIVE),y)