doxygen/I2C: don't include overridden typedefs

Add missing #ifndefs to overridden I2C typedefs.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

cpu/cc2538/include/periph_cpu.h

@@ -106,6 +106,7 @@ void gpio_init_mux(gpio_t pin, uint8_t over, uint8_t sel, uint8_t func);
 #define PERIPH_I2C_NEED_WRITE_REGS
 /** @} */
 
+#ifndef DOXYGEN
 /**
  * @name   Override I2C clock speed values
  * @{
@@ -119,6 +120,8 @@ typedef enum {
     I2C_SPEED_HIGH      = 0x03,     /**< not supported */
 } i2c_speed_t;
 /** @} */
+#endif /* ndef DOXYGEN */
+
 /**
  * @brief   I2C configuration options
  */

cpu/esp32/include/periph_cpu.h

@@ -305,6 +305,7 @@ typedef enum {
  * @{
  */
 
+#ifndef DOXYGEN
 /**
  * @brief    Override I2C clock speed values
  *
@@ -320,6 +321,7 @@ typedef enum {
     I2C_SPEED_HIGH,         /**< not supported */
 } i2c_speed_t;
 /** @} */
+#endif /* ndef DOXYGEN */
 
 /**
  * @brief   I2C configuration structure type

cpu/nrf51/include/periph_cpu.h

@@ -40,6 +40,7 @@ extern "C" {
 #define SPI_MISOSEL         (dev(bus)->PSELMISO)
 /** @} */
 
+#ifndef DOXYGEN
 /**
  * @brief   Override I2C speed settings
  * @{
@@ -53,6 +54,7 @@ typedef enum {
     I2C_SPEED_HIGH      = 0x03,                         /**< not supported */
 } i2c_speed_t;
 /** @} */
+#endif /* ndef DOXYGEN */
 
 /**
  * @name    Use the shared I2C functions

cpu/nrf52/include/periph_cpu.h

@@ -84,6 +84,7 @@ typedef enum {
 /** @} */
 #endif /* ndef DOXYGEN */
 
+#ifndef DOXYGEN
 /**
  * @brief   Override I2C speed settings
  * @{
@@ -97,6 +98,7 @@ typedef enum {
     I2C_SPEED_HIGH      = 0xfd,                         /**< not supported */
 } i2c_speed_t;
 /** @} */
+#endif /* ndef DOXYGEN */
 
 /**
  * @brief   I2C (TWI) configuration options

cpu/sam0_common/include/periph_cpu_common.h

@@ -281,6 +281,7 @@ typedef enum {
     I2C_FLAG_RUN_STANDBY     = 0x1,    /**< run SERCOM in standby mode */
 } i2c_flag_t;
 
+#ifndef DOXYGEN
 /**
  * @name    Override I2C clock speed values
  * @{
@@ -294,6 +295,7 @@ typedef enum {
     I2C_SPEED_HIGH      = 3400000U,    /**< high speed mode:   ~3.4Mbit/s */
 } i2c_speed_t;
 /** @} */
+#endif /* ndef DOXYGEN */
 
 /**
  * @brief   I2C device configuration

cpu/stm32_common/include/periph_cpu_common.h

@@ -504,6 +504,7 @@ typedef struct {
 #endif
 } spi_conf_t;
 
+#ifndef DOXYGEN
 /**
  * @brief   Default mapping of I2C bus speed values
  * @{
@@ -523,6 +524,7 @@ typedef enum {
 #endif
 } i2c_speed_t;
 /** @} */
+#endif /* ndef DOXYGEN */
 
 /**
  * @brief   Structure for I2C configuration data