[nrf fromlist] drivers: entropy: nrf_cracen: align to errno codes in nrfx

NRFX drivers now return errno codes, aligned driver.

Upstream PR #: 97997

Signed-off-by: Michał Stasiak <[email protected]>

Author: mstasiaknordic

drivers/entropy/entropy_nrf_cracen.c

@@ -23,12 +23,10 @@ static int nrf_cracen_get_entropy_isr(const struct device *dev, uint8_t *buf, ui
 
 	irq_unlock(key);
 
-	if (likely(ret == NRFX_SUCCESS)) {
+	if (likely(ret == 0)) {
 		return len;
-	} else if (ret == NRFX_ERROR_INVALID_PARAM) {
-		return -EINVAL;
 	} else {
-		return -EAGAIN;
+		return ret;
 	}
 }
 
@@ -47,13 +45,7 @@ static int nrf_cracen_cracen_init(const struct device *dev)
 {
 	(void)dev;
 
-	int ret = nrfx_cracen_ctr_drbg_init();
-
-	if (ret == NRFX_SUCCESS) {
-		return 0;
-	} else {
-		return -EIO;
-	}
+	return nrfx_cracen_ctr_drbg_init();
 }
 
 static DEVICE_API(entropy, nrf_cracen_api_funcs) = {