Revert breaking API change; deprecate delay instead

Author: lord-ne

src/lib.rs

@@ -39,6 +39,13 @@ pub fn delay_us(us: u32) {
     internal_delay_functions::delay(ticks);
 }
 
+/// Deprecated: If necesarry, use internal_delay_functions::delay instead
+#[inline(always)]
+#[deprecated(since = "0.3.3", note = "If necesarry, users can instead use internal_delay_functions::delay")]
+pub fn delay(count: u32) {
+    internal_delay_functions::delay(u64::from(count));
+}
+
 /// Functions used internally for our busy-wait loop.
 ///
 /// These are not primarily intended to be used in user code, but are left public for