HAL_ChibiOS: enable SDMMC on Pixhawk4Pro

libraries/AP_HAL_ChibiOS/hwdef/Pixhawk4Pro/hwdef.dat

@@ -36,12 +36,6 @@ define CONFIG_HAL_BOARD_SUBTYPE HAL_BOARD_SUBTYPE_CHIBIOS_FMUV5
 define HAL_CHIBIOS_ARCH_FMUV5 1
 define BOARD_TYPE_DEFAULT 24
 
-# board voltage
-STM32_VDD 330U
-
-# flash size
-FLASH_SIZE_KB 2048
-
 # now we define the pins that USB is connected on
 PA11 OTG_FS_DM OTG1
 PA12 OTG_FS_DP OTG1
@@ -285,12 +279,12 @@ SPIDEV external5m3   SPI6 DEVID2  EXT2_CS3   MODE3  2*MHZ  2*MHZ
 
 
 # microSD support (disabled for now)
-#PC8 SDMMC_D0 SDMMC1
-#PC9 SDMMC_D1 SDMMC1
-#PC10 SDMMC_D2 SDMMC1
-#PC11 SDMMC_D3 SDMMC1
-#PC12 SDMMC_CK SDMMC1
-#PD2 SDMMC_CMD SDMMC1
+PC8 SDMMC1_D0 SDMMC1
+PC9 SDMMC1_D1 SDMMC1
+PC10 SDMMC1_D2 SDMMC1
+PC11 SDMMC1_D3 SDMMC1
+PC12 SDMMC1_CK SDMMC1
+PD2 SDMMC1_CMD SDMMC1
 
 # red LED marked as B/E
 PB1 LED_RED OUTPUT GPIO(90)
@@ -320,7 +314,7 @@ define HAL_COMPASS_DEFAULT HAL_COMPASS_NONE
 define HAL_COMPASS_AUTO_ROT_DEFAULT 2
 
 # enable FAT filesystem support (needs a microSD defined via SDMMC)
-# define HAL_OS_FATFS_IO 1
+define HAL_OS_FATFS_IO 1
 
 define HAL_BOARD_LOG_DIRECTORY "/APM/LOGS"
 define HAL_BOARD_TERRAIN_DIRECTORY "/APM/TERRAIN"