tpiu: swo_supports: use &self instead of unsafe Self::ptr

Author: tmplt

src/peripheral/tpiu.rs

@@ -148,8 +148,8 @@ impl TPIU {
     /// Reads the supported trace output modes and the minimum size of
     /// the TPIU FIFO queue for trace data.
     #[inline]
-    pub fn swo_supports() -> SWOSupports {
-        let _type = unsafe { (*Self::ptr())._type.read() };
+    pub fn swo_supports(&self) -> SWOSupports {
+        let _type = self._type.read();
         SWOSupports {
             nrz_encoding: _type.nrzvalid(),
             manchester_encoding: _type.mancvalid(),