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/smccc.c b/cmd/smccc.c
index 8b1475c..0b19f6c 100644
--- a/cmd/smccc.c
+++ b/cmd/smccc.c
@@ -10,7 +10,8 @@
 #include <linux/compiler.h>
 #include <linux/psci.h>
 
-static int do_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_call(struct cmd_tbl *cmdtp, int flag, int argc,
+		   char *const argv[])
 {
 	struct arm_smccc_res res;