Fix a fairly common typo in comments
diff --git a/include/mbedtls/timing.h b/include/mbedtls/timing.h
index cc8754c..ae7a713 100644
--- a/include/mbedtls/timing.h
+++ b/include/mbedtls/timing.h
@@ -92,7 +92,7 @@
* (See \c mbedtls_timing_get_delay().)
*
* \param data Pointer to timing data
- * Must point to a valid \c mbetls_timing_delay_context struct.
+ * Must point to a valid \c mbedtls_timing_delay_context struct.
* \param int_ms First (intermediate) delay in milliseconds.
* \param fin_ms Second (final) delay in milliseconds.
* Pass 0 to cancel the current delay.
@@ -104,7 +104,7 @@
* (Memory helper: number of delays passed.)
*
* \param data Pointer to timing data
- * Must point to a valid \c mbetls_timing_delay_context struct.
+ * Must point to a valid \c mbedtls_timing_delay_context struct.
*
* \return -1 if cancelled (fin_ms = 0)
* 0 if none of the delays are passed,