STM32H7: sd transceiver is now configurable

Author: pennam

targets/TARGET_STM/TARGET_STM32H7/STM32Cube_FW/stm32h7xx_hal_conf.h

@@ -166,7 +166,11 @@
 #define  VDD_VALUE                    (3300UL) /*!< Value of VDD in mv */
 #define  TICK_INT_PRIORITY            (0x0FUL) /*!< tick interrupt priority */
 #define  USE_RTOS                     0
-#define  USE_SD_TRANSCEIVER           1U               /*!< use uSD Transceiver */
+
+#if MBED_CONF_TARGET_SD_TRANSCEIVER_AVAILABLE
+  #define  USE_SD_TRANSCEIVER           1U               /*!< use uSD Transceiver */
+#endif /* USE_SD_TRANSCEIVER */
+
 #define  USE_SPI_CRC                  1U               /*!< use CRC in SPI */
 
 #define  USE_HAL_ADC_REGISTER_CALLBACKS     0U /* ADC register callback disabled     */

targets/targets.json

@@ -2776,6 +2776,10 @@
                 "expected_value2": "PWR_SMPS_1V8_SUPPLIES_LDO | PWR_SMPS_2V5_SUPPLIES_LDO | PWR_SMPS_1V8_SUPPLIES_EXT_AND_LDO | PWR_SMPS_2V5_SUPPLIES_EXT_AND_LDO",
                 "expected_value3": "PWR_SMPS_1V8_SUPPLIES_EXT | PWR_SMPS_2V5_SUPPLIES_EXT | PWR_EXTERNAL_SOURCE_SUPPLY",
                 "value": "NC"
+            },
+            "sd_transceiver_available": {
+                "help": "Define if SD transceiver is available on the board (0 = No, 1 = Yes).",
+                "value": 1
             }
         },
         "components_add": [