part: Drop disk_partition_t typedef

We should not be using typedefs and these make it harder to use
forward declarations (to reduce header file inclusions). Drop the typedef.

Signed-off-by: Simon Glass <sjg@chromium.org>

cmd/read.c

@@ -18,7 +18,7 @@ int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	struct blk_desc *dev_desc = NULL;
 	int dev;
 	int part = 0;
-	disk_partition_t part_info;
+	struct disk_partition part_info;
 	ulong offset = 0u;
 	ulong limit = 0u;
 	void *addr;