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/board/renesas/stout/cpld.c b/board/renesas/stout/cpld.c
index e6c2051..b56ed17 100644
--- a/board/renesas/stout/cpld.c
+++ b/board/renesas/stout/cpld.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <cpu_func.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
@@ -124,7 +125,8 @@
 #endif
 }
 
-static int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_cpld(struct cmd_tbl *cmdtp, int flag, int argc,
+		   char *const argv[])
 {
 	u32 addr, val;