[PATCH] Make fio build again on "crippled" platforms

Some time in the future we want a proper configure setup and only
install the supported io engines, for now install limited versions
that just complain on initialization.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/init.c b/init.c
index 7b2b512..3c27ea5 100644
--- a/init.c
+++ b/init.c
@@ -60,8 +60,10 @@
 static int str_mem_cb(void *, const char *);
 static int str_verify_cb(void *, const char *);
 static int str_lockmem_cb(void *, unsigned long *);
+#ifdef FIO_HAVE_IOPRIO
 static int str_prio_cb(void *, unsigned int *);
 static int str_prioclass_cb(void *, unsigned int *);
+#endif
 static int str_exitall_cb(void);
 static int str_cpumask_cb(void *, unsigned int *);
 
@@ -844,6 +846,7 @@
 	return 0;
 }
 
+#ifdef FIO_HAVE_IOPRIO
 static int str_prioclass_cb(void *data, unsigned int *val)
 {
 	struct thread_data *td = data;
@@ -859,6 +862,7 @@
 	td->ioprio |= *val;
 	return 0;
 }
+#endif
 
 static int str_exitall_cb(void)
 {