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>

arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c

@@ -3,7 +3,7 @@
  * Copyright (C) 2020, STMicroelectronics - All Rights Reserved
  */
 
-#include <common.h>
+#include <command.h>
 #include <console.h>
 #include <dfu.h>
 #include <malloc.h>