AP_Filesystem: Add dir type to fatfs

libraries/AP_Filesystem/AP_Filesystem_FATFS.cpp

@@ -716,6 +716,11 @@ struct dirent *AP_Filesystem::readdir(DIR *dirp)
     len = strlen(fno.fname);
     strncpy(d->de.d_name,fno.fname,len);
     d->de.d_name[len] = 0;
+    if (fno.fattrib & AM_DIR) {
+        d->de.d_type = DT_DIR;
+    } else {
+        d->de.d_type = DT_REG;
+    }
     return &d->de;
 }
 

libraries/AP_Filesystem/AP_Filesystem_FATFS.h

@@ -20,6 +20,10 @@
 #define MAX_NAME_LEN 13
 #endif
 
+#define DT_REG 0
+#define DT_DIR 1
+
 struct dirent {
    char           d_name[MAX_NAME_LEN]; /* filename */
+   uint8_t d_type;
 };