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/x86/lib/cmd_boot.c

@@ -22,7 +22,7 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 unsigned long do_go_exec(ulong (*entry)(int, char * const []),
-			 int argc, char * const argv[])
+			 int argc, char *const argv[])
 {
 	unsigned long ret = 0;
 	char **argv_tmp;