configs/lc823450-xgevk/src: Eliminate some warnings. drivers/usbhost: Update comments.

configs/lc823450-xgevk/src/lc823450_appinit.c

@@ -178,6 +178,8 @@ int board_app_initialize(uintptr_t arg)
 
 #endif /* CONFIG_LC823450_MTD */
 
+  UNUSED(ret); /* May not be used */
+
 #ifndef CONFIG_BOARD_INITIALIZE
   /* Perform board initialization */
 

configs/lc823450-xgevk/src/lc823450_boot.c

@@ -38,9 +38,13 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
+
 #include <debug.h>
+
 #include <nuttx/board.h>
 
+#include "lc823450-xgevk.h"
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -66,3 +70,4 @@ void board_initialize(void)
   (void)lc823450_bringup();
 }
 #endif /* CONFIG_BOARD_INITIALIZE */
+

drivers/usbhost/usbhost_max3421e.c

@@ -587,7 +587,7 @@ static inline int max3421e_hw_initialize(FAR struct max3421e_usbhost_s *priv);
  ****************************************************************************/
 
 #ifdef HAVE_USBHOST_TRACE
-/* TODO:  Improve format strings so that they are self-explanatory. */
+/* Trace/debug format strings. */
 
 static const struct max3421e_usbhost_trace_s g_trace1[TRACE1_NSTRINGS] =
 {