pkg/esp32_sdk_lib_bt_esp32c3: add BLE library for ESP32-C3

pkg/esp32_sdk_lib_bt_esp32c3/Kconfig

@@ -0,0 +1,14 @@
+# Copyright (c) 2021 Gunar Schorcht
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+
+config PACKAGE_ESP32_SDK_LIB_BT_ESP32C3
+    bool "ESP32 SDK Bluetooth library for the ESP32-C3 SoC"
+    depends on TEST_KCONFIG
+    depends on HAS_ARCH_ESP32
+    depends on HAS_ESP_BLE_ESP32C3
+    help
+        Vendor SDK Bluetooth library for ESP32-C3 SoC

pkg/esp32_sdk_lib_bt_esp32c3/Makefile

@@ -0,0 +1,10 @@
+PKG_NAME=esp32_sdk_lib_bt_esp32c3
+PKG_URL=https://github.com/espressif/esp32c3-bt-lib
+# This is a version in the v4.4.1 release branch
+PKG_VERSION=98dcc9591365b5ac486a9f0b474c36bf8c4ca97b
+PKG_LICENSE=Apache-2.0
+
+include $(RIOTBASE)/pkg/pkg.mk
+
+# there is nothing to compile
+all:

pkg/esp32_sdk_lib_bt_esp32c3/Makefile.dep

@@ -0,0 +1,4 @@
+# This package can only be used with the ESP32 CPU
+FEATURES_REQUIRED += arch_esp32
+FEATURES_REQUIRED += esp_ble
+FEATURES_REQUIRED += esp_ble_esp32c3

pkg/esp32_sdk_lib_bt_esp32c3/Makefile.include

@@ -0,0 +1,3 @@
+export ESP32_SDK_LIB_BT_DIR ?= $(PKGDIRBASE)/esp32_sdk_lib_bt_esp32c3
+
+PSEUDOMODULES += esp32_sdk_lib_bt_esp32c3

pkg/esp32_sdk_lib_bt_esp32c3/doc.txt

@@ -0,0 +1,6 @@
+/**
+ * @defgroup pkg_esp32_sdk_lib_bt_esp32c3  ESP32 SDK Bluetooth library for the ESP32-C3 SoC
+ * @ingroup  pkg_esp32_sdk
+ * @brief    Vendor SDK Bluetooth library for ESP32-C3 SoC by Espressif
+ * @see      https://github.com/espressif/esp32c3-bt-lib
+ */