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/ubifs.c b/cmd/ubifs.c
index e4000b7..e798b83 100644
--- a/cmd/ubifs.c
+++ b/cmd/ubifs.c
@@ -38,8 +38,9 @@
 
 	return ret;
 }
-static int do_ubifs_mount(cmd_tbl_t *cmdtp, int flag, int argc,
-				char * const argv[])
+
+static int do_ubifs_mount(struct cmd_tbl *cmdtp, int flag, int argc,
+			  char *const argv[])
 {
 	char *vol_name;
 
@@ -70,8 +71,8 @@
 	return 0;
 }
 
-static int do_ubifs_umount(cmd_tbl_t *cmdtp, int flag, int argc,
-				char * const argv[])
+static int do_ubifs_umount(struct cmd_tbl *cmdtp, int flag, int argc,
+			   char *const argv[])
 {
 	if (argc != 1)
 		return CMD_RET_USAGE;
@@ -79,8 +80,8 @@
 	return cmd_ubifs_umount();
 }
 
-static int do_ubifs_ls(cmd_tbl_t *cmdtp, int flag, int argc,
-			char * const argv[])
+static int do_ubifs_ls(struct cmd_tbl *cmdtp, int flag, int argc,
+		       char *const argv[])
 {
 	char *filename = "/";
 	int ret;
@@ -103,8 +104,8 @@
 	return ret;
 }
 
-static int do_ubifs_load(cmd_tbl_t *cmdtp, int flag, int argc,
-				char * const argv[])
+static int do_ubifs_load(struct cmd_tbl *cmdtp, int flag, int argc,
+			 char *const argv[])
 {
 	char *filename;
 	char *endp;