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/cmd/fdt.c b/cmd/fdt.c
index f66ceca..99b1b5b 100644
--- a/cmd/fdt.c
+++ b/cmd/fdt.c
@@ -88,7 +88,7 @@
 	"size_dt_struct",
 };
 
-static int fdt_get_header_value(int argc, char * const argv[])
+static int fdt_get_header_value(int argc, char *const argv[])
 {
 	fdt32_t *fdtp = (fdt32_t *)working_fdt;
 	ulong val;
@@ -112,7 +112,7 @@
 /*
  * Flattened Device Tree command, see the help for parameter definitions.
  */
-static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	if (argc < 2)
 		return CMD_RET_USAGE;