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/cavium/thunderx/atf.c b/board/cavium/thunderx/atf.c
index ea2f2ba..f01ead4 100644
--- a/board/cavium/thunderx/atf.c
+++ b/board/cavium/thunderx/atf.c
@@ -4,6 +4,7 @@
 **/
 
 #include <common.h>
+#include <command.h>
 #include <asm/cache.h>
 #include <asm/io.h>
 
@@ -224,7 +225,7 @@
 	}
 }
 
-int do_atf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_atf(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	ssize_t ret;
 	size_t size, offset;