x86: Add reserve_ebda_region to x86_init_ops

reserve_ebda_region needs to be called befor start_kernel. Moorestown
needs to override it. Make it a x86_init_ops function and initialize
it with the default reserve_ebda_region.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/x86_init.c

@@ -5,6 +5,7 @@
  */
 #include <linux/init.h>
 
+#include <asm/bios_ebda.h>
 #include <asm/setup.h>
 
 void __cpuinit x86_init_noop(void) { }
@@ -18,5 +19,6 @@ struct __initdata x86_init_ops x86_init = {
 	.resources = {
 		.probe_roms		= x86_init_noop,
 		.reserve_resources	= reserve_standard_io_resources,
+		.reserve_ebda_region	= reserve_ebda_region,
 	},
 };