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/clk/mpc83xx_clk.c b/drivers/clk/mpc83xx_clk.c
index 4183db2..fa519a4 100644
--- a/drivers/clk/mpc83xx_clk.c
+++ b/drivers/clk/mpc83xx_clk.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <clk-uclass.h>
 #include <clock_legacy.h>
+#include <command.h>
 #include <dm.h>
 #include <vsprintf.h>
 #include <dm/lists.h>
@@ -390,7 +391,8 @@
 	.bind = mpc83xx_clk_bind,
 };
 
-static int do_clocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_clocks(struct cmd_tbl *cmdtp, int flag, int argc,
+		     char *const argv[])
 {
 	int i;
 	char buf[32];