Fix formatting

riscv/src/delay.rs

@@ -21,10 +21,10 @@ impl McycleDelay {
 
 impl DelayNs for McycleDelay {
     #[inline]
-   fn delay_ns(&mut self, ns: u32) {
+    fn delay_ns(&mut self, ns: u32) {
         let t0 = mcycle::read64();
         let ns_64: u64 = ns.into();
         let clock = (ns_64 * (self.ticks_second as u64)) / 1_000_000_000u64;
         while mcycle::read64().wrapping_sub(t0) <= clock {}
-   }
+    }
 }