rtt: Move initlization print

Move initialization print to C because in rust we don't know if the C
code is compiled with NDEBUG or not.

Author: NickeZ

src/rust/util/src/log.rs

@@ -51,8 +51,6 @@ pub fn rtt_init() {
             CH0_DOWN = Some(channels.down.0);
             CH1_UP = Some(channels.up.1);
         }
-
-        log!("RTT Initialized");
     }
 }
 

src/util.c

@@ -101,5 +101,6 @@ void util_log_flush(void)
 void util_log_init(void)
 {
     rust_rtt_init();
+    util_log("RTT Initialized");
 }
 #endif