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/arch/sh/lib/bootm.c b/arch/sh/lib/bootm.c
index 5f14a04..dc94f83 100644
--- a/arch/sh/lib/bootm.c
+++ b/arch/sh/lib/bootm.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <env.h>
 #include <image.h>
 #include <asm/byteorder.h>
 #include <asm/zimage.h>
@@ -50,7 +51,8 @@
 	return val;
 }
 
-int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
+int do_bootm_linux(int flag, int argc, char *const argv[],
+		   bootm_headers_t *images)
 {
 	/* Linux kernel load address */
 	void (*kernel) (void) = (void (*)(void))images->ep;