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/qe/qe.c b/drivers/qe/qe.c
index fbad124..61ca476 100644
--- a/drivers/qe/qe.c
+++ b/drivers/qe/qe.c
@@ -781,7 +781,7 @@
 	return qe_firmware_uploaded ? &qe_firmware_info : NULL;
 }
 
-static int qe_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int qe_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	ulong addr;