x86: remove all definitions with fastcall

fastcall is always defined to be empty, remove it from arch/x86

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/xen/events.c b/arch/x86/xen/events.c
index aebab97..dcf613e 100644
--- a/arch/x86/xen/events.c
+++ b/arch/x86/xen/events.c
@@ -465,7 +465,7 @@
  * a bitset of words which contain pending event bits.  The second
  * level is a bitset of pending events themselves.
  */
-fastcall void xen_evtchn_do_upcall(struct pt_regs *regs)
+void xen_evtchn_do_upcall(struct pt_regs *regs)
 {
 	int cpu = get_cpu();
 	struct shared_info *s = HYPERVISOR_shared_info;