fix missing field in ptp_clock_caps

Author: folkertdev

src/unix/linux_like/linux/mod.rs

@@ -666,7 +666,8 @@ s! {
         pub n_pins: ::c_int,
         pub cross_timestamping: ::c_int,
         pub adjust_phase: ::c_int,
-        pub rsv: [::c_int; 12],
+        pub max_phase_adj: ::c_int,
+        pub rsv: [::c_int; 11],
     }
 
     pub struct ptp_extts_request {