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/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 1fff49a..1965bff 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -7,6 +7,7 @@
 
 #include <asm/bios_ebda.h>
 #include <asm/setup.h>
+#include <asm/e820.h>
 
 void __cpuinit x86_init_noop(void) { }
 
@@ -20,5 +21,6 @@
 		.probe_roms		= x86_init_noop,
 		.reserve_resources	= reserve_standard_io_resources,
 		.reserve_ebda_region	= reserve_ebda_region,
+		.memory_setup		= default_machine_specific_memory_setup,
 	},
 };