Merge pull request #4223 from fpagliughi/canfd_fdf

Add new CANFD_FDF flag for the 'flags' field of 'canfd_frame'.

Author: tgross35

src/unix/linux_like/linux/mod.rs

@@ -5307,6 +5307,7 @@ pub const CANFD_MAX_DLEN: usize = 64;
 
 pub const CANFD_BRS: c_int = 0x01;
 pub const CANFD_ESI: c_int = 0x02;
+pub const CANFD_FDF: c_int = 0x04;
 
 pub const CANXL_MIN_DLC: c_int = 0;
 pub const CANXL_MAX_DLC: c_int = 2047;