am261x/am263x/am263px: rng: udpate structure

- Result Length should not be a pointer

Fixes: TIFSMCU-2526

Signed-off-by: Mitul Tyagi <mitulty@ti.com>

Author: ti-mitulty

examples/drivers/hsmclient/hsm_services/trng_service_app.c

@@ -63,7 +63,7 @@ void HsmRngApp_start(HsmClient_t *client)
     getRNG.DRBGMode = 0x5A;
     getRNG.seedSizeInDWords = SEED_SIZE_IN_DWORDS;
     getRNG.seedValue = (uint32_t *)&RngDrbgSeed;
-    getRNG.resultLengthPtr = &length;
+    getRNG.resultLength = length;
     getRNG.resultPtr = (uint8_t *)val;
 
     CycleCounterP_reset();