bdev/aio: Move epoll include inside bdev_aio.c

It does not need to be in the header file.

Change-Id: I5c489de81e48b11d02b66cbdd6d9ac05eae16429
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/c/443306
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

lib/bdev/aio/bdev_aio.c

@@ -46,6 +46,9 @@
 
 #include "spdk_internal/log.h"
 
+#include <sys/epoll.h>
+#include <sys/eventfd.h>
+
 static int bdev_aio_initialize(void);
 static void bdev_aio_fini(void);
 static void aio_free_disk(struct file_disk *fdisk);

lib/bdev/aio/bdev_aio.h

@@ -37,8 +37,6 @@
 #include "spdk/stdinc.h"
 
 #include <libaio.h>
-#include <sys/epoll.h>
-#include <sys/eventfd.h>
 
 #include "spdk/queue.h"
 #include "spdk/bdev.h"