add missing includes

Author: robamu

esp-hal-smartled/src/lib.rs

@@ -29,7 +29,10 @@ use esp_hal::{
     clock::Clocks,
     gpio::OutputPin,
     peripheral::Peripheral,
-    rmt::{Error as RmtError, PulseCode, TxChannel, TxChannelConfig, TxChannelCreator},
+    rmt::{
+        Error as RmtError, PulseCode, TxChannel, TxChannelAsync, TxChannelConfig, TxChannelCreator,
+        TxChannelCreatorAsync,
+    },
 };
 use smart_leds_trait::{SmartLedsWrite, SmartLedsWriteAsync, RGB8};