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>

test/lib/cmd_ut_lib.c

@@ -11,7 +11,7 @@
 #include <test/suites.h>
 #include <test/ut.h>
 
-int do_ut_lib(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_ut_lib(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct unit_test *tests = ll_entry_start(struct unit_test, lib_test);
 	const int n_ents = ll_entry_count(struct unit_test, lib_test);