x86: Move memory_setup to x86_init_ops

memory_setup is overridden by x86_quirks and by paravirts with weak
functions and quirks. Unify the whole mess and make it an
unconditional x86_init_ops function which defaults to the standard
function and can be overridden by the early platform code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index e90540a..50b20c6 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -841,7 +841,6 @@
 	.patch = xen_patch,
 
 	.banner = xen_banner,
-	.memory_setup = xen_memory_setup,
 	.arch_setup = xen_arch_setup,
 	.post_allocator_init = xen_post_allocator_init,
 };
@@ -982,6 +981,8 @@
 	pv_apic_ops = xen_apic_ops;
 	pv_mmu_ops = xen_mmu_ops;
 
+	x86_init.resources.memory_setup = xen_memory_setup;
+
 #ifdef CONFIG_X86_64
 	/*
 	 * Setup percpu state.  We only need to do this for 64-bit