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>
diff --git a/board/esd/vme8349/caddy.c b/board/esd/vme8349/caddy.c
index db8d7bf..ba91f4b 100644
--- a/board/esd/vme8349/caddy.c
+++ b/board/esd/vme8349/caddy.c
@@ -7,6 +7,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <console.h>
 #include <ioports.h>
 #include <mpc83xx.h>
@@ -36,7 +37,7 @@
 		caddy_interface->answer_in = ptr;
 }
 
-int do_caddy(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_caddy(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	unsigned long base_addr;
 	uint32_t ptr;