comments the performance of TRNG

Signed-off-by: PARKJIHOON <[email protected]>

Author: jh6186

targets/TARGET_Samsung/security_subsystem/api/trng_api.c

@@ -42,6 +42,7 @@ int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_l
     unsigned int ret = 0;
 
     stRANDOM.pu08Data = (u08 *)output;
+	//generate an approximation of 1
     ret = sss_generate_rawrandom(&stRANDOM, length);
 
     *output_length = (size_t)stRANDOM.u32DataByteLen;