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>

cmd/ti/ddr3.c

@@ -6,6 +6,7 @@
  */
 
 #include <cpu_func.h>
+#include <env.h>
 #include <init.h>
 #include <asm/arch/hardware.h>
 #include <asm/cache.h>
@@ -276,8 +277,8 @@ static int is_ecc_enabled(void)
 		(ecc_ctrl & EMIF_ECC_REG_RMW_EN_MASK);
 }
 
-static int do_ddr_test(cmd_tbl_t *cmdtp,
-		       int flag, int argc, char * const argv[])
+static int do_ddr_test(struct cmd_tbl *cmdtp,
+		       int flag, int argc, char *const argv[])
 {
 	u32 start_addr, end_addr, size, ecc_err;