drivers: entropy: npcx: add rng driver support

This commit add the rng driver support by using the npcx drgb API.

Signed-off-by: Jun Lin <CHLin56@nuvoton.com>

soc/nuvoton/npcx/common/soc_ncl.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2024 Nuvoton Technology Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _NUVOTON_NPCX_SOC_NCL_H_
+#define _NUVOTON_NPCX_SOC_NCL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* The status code returns from Nuvoton Cryptographic Library ROM APIs */
+enum ncl_status {
+	NCL_STATUS_OK = 0xA5A5,
+	NCL_STATUS_FAIL = 0x5A5A,
+	NCL_STATUS_INVALID_PARAM = 0x02,
+	NCL_STATUS_PARAM_NOT_SUPPORTED = 0x03,
+	NCL_STATUS_SYSTEM_BUSY = 0x04,
+	NCL_STATUS_AUTHENTICATION_FAIL = 0x05,
+	NCL_STATUS_NO_RESPONSE = 0x06,
+	NCL_STATUS_HARDWARE_ERROR = 0x07
+};
+
+enum ncl_sha_type {
+	NCL_SHA_TYPE_2_256 = 0,
+	NCL_SHA_TYPE_2_384 = 1,
+	NCL_SHA_TYPE_2_512 = 2,
+	NCL_SHA_TYPE_NUM
+};
+
+/*
+ * This enum defines the security strengths supported by this DRBG mechanism.
+ * The internally generated entropy and nonce sizes are derived from these
+ * values. The supported actual sizes:
+ *       Security strength (bits)    112 128 192 256 128_Test 256_Test
+ *
+ *       Entropy size (Bytes)        32  48  64  96  111      128
+ *       Nonce size (Bytes)          16  16  24  32  16       0
+ */
+enum ncl_drbg_security_strength {
+	NCL_DRBG_SECURITY_STRENGTH_112B = 0,
+	NCL_DRBG_SECURITY_STRENGTH_128B,
+	NCL_DRBG_SECURITY_STRENGTH_192B,
+	NCL_DRBG_SECURITY_STRENGTH_256B,
+	NCL_DRBG_SECURITY_STRENGTH_128B_TEST,
+	NCL_DRBG_SECURITY_STRENGTH_256B_TEST,
+	NCL_DRBG_MAX_SECURITY_STRENGTH
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _NUVOTON_NPCX_SOC_NCL_H_ */