RX65N Pre-check Warnings Resolved

arch/renesas/src/rx65n/rx65n_cgc.c

@@ -39,7 +39,9 @@
 
 void r_cgc_create(void)
 {
+#ifdef CONFIG_RX65N_RTC
   volatile uint8_t i;
+#endif
 #if ((24 * RX_CLK_1MHz) == RX_RESONATOR)
   /* Set main clock control registers */
 

boards/renesas/rx65n/rx65n-grrose/src/rx65n_bringup.c

@@ -106,6 +106,7 @@ static int rtc_driver_initialize(void)
 
 int rx65n_bringup(void)
 {
+#if defined (HAVE_RTC_DRIVER) || defined (CONFIG_FS_PROCFS)
   int ret;
 #ifdef HAVE_RTC_DRIVER
   ret = rtc_driver_initialize();
@@ -128,6 +129,7 @@ int rx65n_bringup(void)
     }
 
 #endif
+#endif
 
 #ifdef CONFIG_RX65N_SBRAM
   /* Initialize battery-backed RAM */

boards/renesas/rx65n/rx65n-rsk2mb/src/rx65n_appinit.c

@@ -28,6 +28,7 @@
 #include <stdint.h>
 
 #include <nuttx/board.h>
+#include "rx65n_rsk2mb.h"
 
 #ifdef CONFIG_LIB_BOARDCTL