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/lib/uuid.c b/lib/uuid.c
index f94c6ab..e62d5ca 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <env.h>
 #include <rand.h>
 #include <time.h>
@@ -286,7 +287,7 @@
 }
 
 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_CMD_UUID)
-int do_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_uuid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	char uuid[UUID_STR_LEN + 1];
 	int str_format;