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/drivers/misc/altera_sysid.c b/drivers/misc/altera_sysid.c
index eff33f7..387c70b 100644
--- a/drivers/misc/altera_sysid.c
+++ b/drivers/misc/altera_sysid.c
@@ -44,7 +44,7 @@
 	printf("SYSID: %08x, %s", sysid[0], asc);
 }
 
-int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_sysid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	display_sysid();
 	return 0;