itm, dwt: limit some bitfields to u8

Author: tmplt

src/peripheral/dwt.rs

@@ -78,7 +78,7 @@ bitfield! {
     #[derive(Copy, Clone)]
     /// Comparator FUNCTIONn register.
     pub struct Function(u32);
-    get_function, set_function: 3, 0;
+    u8, get_function, set_function: 3, 0;
     get_emitrange, set_emitrange: 5;
     get_cycmatch, set_cycmatch: 7;
     get_datavmatch, set_datavmatch: 8;

src/peripheral/itm.rs

@@ -41,9 +41,9 @@ bitfield! {
     get_syncena, set_synena: 2;
     get_txena, set_txena: 3;
     get_swoena, set_swoena: 4;
-    get_tsprescale, set_tsprecale: 9, 8;
-    get_gtsfreq, set_gtsfreq: 11, 10;
-    get_tracebusid, set_tracebusid: 22, 16;
+    u8, get_tsprescale, set_tsprecale: 9, 8;
+    u8, get_gtsfreq, set_gtsfreq: 11, 10;
+    u8, get_tracebusid, set_tracebusid: 22, 16;
     busy, _: 23;
 }