Change FIOC_MMAP into file operation call

- Add mmap into file_operations and remove it from ioctl definitions.
- Add mm_map structure definitions to support future unmapping
- Modify all drivers to initialize the operations struct accordingly

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

fs/mqueue/mq_open.c

@@ -61,6 +61,7 @@ static const struct file_operations g_nxmq_fileops =
   NULL,             /* seek */
   NULL,             /* ioctl */
   NULL,             /* truncate */
+  NULL,             /* mmap */
   nxmq_file_poll    /* poll */
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
   , NULL            /* unlink */