drivers: entropy: Modify the recover_seed_error function for WB0x

Exclude the WB0x series from discarding data 12 times from the RNG data
register.

Add a comment to the recover_seed_error function explaining the reason
for reading and discarding data from the RNG data register 12 times.

Signed-off-by: Ali Hozhabri <[email protected]>

Author: HoZHel

drivers/entropy/entropy_stm32.c

@@ -301,9 +301,14 @@ static int recover_seed_error(RNG_TypeDef *rng)
 {
 	ll_rng_clear_seis(rng);
 
+#if !defined(CONFIG_SOC_SERIES_STM32WB0X)
+	/* After a noise source error is detected, 12 words must be read from the RNG_DR register
+	 * and discarded to restart the entropy generation.
+	 */
 	for (int i = 0; i < 12; ++i) {
 		(void)ll_rng_read_rand_data(rng);
 	}
+#endif /* !CONFIG_SOC_SERIES_STM32WB0X */
 
 	if (ll_rng_is_active_seis(rng) != 0) {
 		return -EIO;
@@ -419,7 +424,7 @@ static uint16_t generate_from_isr(uint8_t *buf, uint16_t len)
 		byte = random_byte_get();
 #if !IRQLESS_TRNG
 		NVIC_ClearPendingIRQ(IRQN);
-#endif /* IRQLESS_TRNG */
+#endif /* !IRQLESS_TRNG */
 
 		if (byte < 0) {
 			continue;