CLEANUP: turned if statement into match

kernel/src/kmain.rs

@@ -61,11 +61,14 @@ pub fn kmain(cmdline: &str, bootstrap: Option<&'static [u8]>) -> ! {
                 }
             }
 
-            let byte = sc.receive();
-            if byte == b'\r' {
-                sc.send(b'\n');
+            match sc.receive() {
+                b'\r' => {
+                    sc.send(b'\n');
+                }
+                byte => {
+                    sc.send(byte);
+                }
             }
-            sc.send(byte);
         }
     }
 }