command: Remove the cmd_tbl_t typedef

We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

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

cmd/blob.c

@@ -48,7 +48,8 @@ __weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
  * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
  * on error.
  */
-static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+static int do_blob(struct cmd_tbl *cmdtp, int flag, int argc,
+		   char *const argv[])
 {
 	ulong key_addr, src_addr, dst_addr, len;
 	uint8_t *km_ptr, *src_ptr, *dst_ptr;