ia64: Define machvec_noop as "static inline"

This way, non-GENERIC kernels can optimize away the no-op calls
while GENERIC kernels can still take the address of the function
to initialize the machvec vector.

arch/ia64/kernel/machvec.c

@@ -43,12 +43,6 @@ machvec_init (const char *name)
 
 #endif /* CONFIG_IA64_GENERIC */
 
-void
-machvec_noop (void)
-{
-}
-EXPORT_SYMBOL(machvec_noop);
-
 void
 machvec_setup (char **arg)
 {

include/asm-ia64/machvec.h

@@ -69,7 +69,11 @@ typedef unsigned short ia64_mv_readw_relaxed_t (void *);
 typedef unsigned int ia64_mv_readl_relaxed_t (void *);
 typedef unsigned long ia64_mv_readq_relaxed_t (void *);
 
-extern void machvec_noop (void);
+static inline void
+machvec_noop (void)
+{
+}
+
 extern void machvec_setup (char **);
 extern void machvec_timer_interrupt (int, void *, struct pt_regs *);
 extern void machvec_dma_sync_single (struct device *, dma_addr_t, size_t, int);