RNG - fix warnings due to obj not used for some targets

Author: 0xc0170

hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/rng_api.c

@@ -30,13 +30,15 @@
 
 void rng_init(rng_t *obj)
 {
+    (void)obj;
     CLOCK_EnableClock(kCLOCK_Rnga0);
     CLOCK_DisableClock(kCLOCK_Rnga0);
     CLOCK_EnableClock(kCLOCK_Rnga0);
 }
 
 void rng_free(rng_t *obj)
 {
+    (void)obj;
     CLOCK_DisableClock(kCLOCK_Rnga0);
 }
 
@@ -58,6 +60,7 @@ static void rng_get_byte(unsigned char *byte)
 
 int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
+    (void)obj;
     size_t i;
     int ret;
 

hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/rng_api.c

@@ -30,13 +30,15 @@
 
 void rng_init(rng_t *obj)
 {
+    (void)obj;
     CLOCK_EnableClock(kCLOCK_Rnga0);
     CLOCK_DisableClock(kCLOCK_Rnga0);
     CLOCK_EnableClock(kCLOCK_Rnga0);
 }
 
 void rng_free(rng_t *obj)
 {
+    (void)obj;
     CLOCK_DisableClock(kCLOCK_Rnga0);
 }
 
@@ -58,6 +60,7 @@ static void rng_get_byte(unsigned char *byte)
 
 int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
+    (void)obj;
     size_t i;
     int ret;
 

hal/targets/hal/TARGET_NUVOTON/TARGET_NUC472/rng_api.c

@@ -58,6 +58,7 @@ static void rng_get(unsigned char *pConversionData)
 
 void rng_init(rng_t *obj)
 {
+    (void)obj;
     /* Unlock protected registers */
     SYS_UnlockReg();    
     /* Enable IP clock */
@@ -72,13 +73,16 @@ void rng_init(rng_t *obj)
 
 void rng_free(rng_t *obj)
 {
+    (void)obj;
     PRNG_DISABLE_INT();
     NVIC_DisableIRQ(CRPT_IRQn);
     //CLK_DisableModuleClock(CRPT_MODULE);
 }
 
 int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
+    (void)obj;
+
     *output_length = 0;
     if (length < 32) {
         unsigned char tmpBuff[32];