Change u8_t to uint8_t to fix a build issue with Docker under macOS (#2151)

Change `u8_t` to `uint8_t` to fix a build issue with Docker under macOS. This addresses issue #2149 .

Co-authored-by: Gerd Knops <gerd-git@knops.org>

Author: gknops

source/Core/BSP/Pinecilv2/bl_mcu_sdk/components/ble/ble_stack/host/ecc.h

@@ -16,7 +16,7 @@ struct bt_pub_key_cb {
    *
    *  @param key The local public key, or NULL in case of no key.
    */
-  void (*func)(const u8_t key[64]);
+  void (*func)(const uint8_t key[64]);
 
   struct bt_pub_key_cb *_next;
 };
@@ -40,7 +40,7 @@ int bt_pub_key_gen(struct bt_pub_key_cb *cb);
  *
  *  @return Current key, or NULL if not available.
  */
-const u8_t *bt_pub_key_get(void);
+const uint8_t *bt_pub_key_get(void);
 
 /*  @typedef bt_dh_key_cb_t
  *  @brief Callback type for DH Key calculation.
@@ -49,7 +49,7 @@ const u8_t *bt_pub_key_get(void);
  *
  *  @param key The DH Key, or NULL in case of failure.
  */
-typedef void (*bt_dh_key_cb_t)(const u8_t key[32]);
+typedef void (*bt_dh_key_cb_t)(const uint8_t key[32]);
 
 /*  @brief Calculate a DH Key from a remote Public Key.
  *
@@ -60,4 +60,4 @@ typedef void (*bt_dh_key_cb_t)(const u8_t key[32]);
  *
  *  @return Zero on success or negative error code otherwise
  */
-int bt_dh_key_gen(const u8_t remote_pk[64], bt_dh_key_cb_t cb);
+int bt_dh_key_gen(const uint8_t remote_pk[64], bt_dh_key_cb_t cb);