x86: unify struct desc_ptr

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/lguest.h b/include/asm-x86/lguest.h
index 17c908c..3585a16 100644
--- a/include/asm-x86/lguest.h
+++ b/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];