Small cleanup:

* Fixed comment spelling
* Fixed TODO in watchdog for SAM4E

src/gpio.rs

@@ -33,7 +33,7 @@ use {
 pub trait GpioExt {
     type Parts;
 
-    /// Consume and split the device into its constitent parts
+    /// Consume and split the device into its constituent parts
     fn split(self) -> Self::Parts;
 }
 pub struct Ports {

src/watchdog.rs

@@ -16,13 +16,6 @@ impl watchdog::Watchdog for Watchdog {
     /// Feeds an existing watchdog to ensure the processor isn't reset.
     /// Sometimes commonly referred to as "kicking" or "refreshing".
     fn feed(&mut self) {
-        // TODO Bug in atsam4e16e pac (atsam4s includes passwd() set option)
-        #[cfg(feature = "atsam4e")]
-        self.wdt
-            .cr
-            .write_with_zero(|w| unsafe { w.key().bits(0xA5).wdrstt().set_bit() });
-
-        #[cfg(feature = "atsam4s")]
         self.wdt
             .cr
             .write_with_zero(|w| w.key().passwd().wdrstt().set_bit());