arch/xtensa/espressif: Fix I2C Slave driver build error

Add missing files which are causing I2C Slave driver build error for Xtensa based Espressif devices

Signed-off-by: Eren Terzioglu <eren.terzioglu@espressif.com>

arch/xtensa/src/common/espressif/esp_i2c_slave.h

@@ -0,0 +1,92 @@
+/****************************************************************************
+ * arch/xtensa/src/common/espressif/esp_i2c_slave.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_XTENSA_SRC_COMMON_ESPRESSIF_ESP_I2C_SLAVE_H
+#define __ARCH_XTENSA_SRC_COMMON_ESPRESSIF_ESP_I2C_SLAVE_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/i2c/i2c_slave.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_ESPRESSIF_I2C0_SLAVE
+#  define ESPRESSIF_I2C0_SLAVE 0
+#endif
+
+#ifdef CONFIG_ESPRESSIF_I2C1_SLAVE
+#  define ESPRESSIF_I2C1_SLAVE 1
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_SLAVE_MODE
+/****************************************************************************
+ * Name: esp_i2cbus_slave_initialize
+ *
+ * Description:
+ *   Initialize the selected I2C port. And return a unique instance of struct
+ *   struct i2c_slave_s.  This function may be called to obtain multiple
+ *   instances of the interface, each of which may be set up with a
+ *   different frequency.
+ *
+ * Input Parameters:
+ *   port - Port number (for hardware that has multiple I2C interfaces)
+ *   addr - Adress of the slave device
+ *
+ * Returned Value:
+ *   Valid I2C device structure reference on success; a NULL on failure
+ *
+ ****************************************************************************/
+
+struct i2c_slave_s *esp_i2cbus_slave_initialize(int port, int addr);
+
+/****************************************************************************
+ * Name: esp_i2cbus_uninitialize
+ *
+ * Description:
+ *   De-initialize the selected I2C port, and power down the device.
+ *
+ * Input Parameters:
+ *   dev - Device structure as returned by the esp_i2cbus_slave_initialize()
+ *
+ * Returned Value:
+ *   OK on success, ERROR when internal reference count mismatch or dev
+ *   points to invalid hardware device.
+ *
+ ****************************************************************************/
+
+int esp_i2cbus_slave_uninitialize(struct i2c_slave_s *dev);
+#endif /* CONFIG_ESPRESSIF_I2C_PERIPH_SLAVE_MODE */
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_XTENSA_SRC_COMMON_ESPRESSIF_ESP_I2C_SLAVE_H */