sandbox: Add bootm support

This adds sandbox architecture support to bootm, although it is probably
not useful to load sandbox code into the address space and execute it.

This change at least make the file build correctly on 64-bit machines.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index c2e8038..bb9b698 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -438,9 +438,8 @@
 		setenv("filesize", buf);
 		return 0;
 	}
-	appl = (int (*)(int, char * const []))ntohl(images.ep);
+	appl = (int (*)(int, char * const []))(ulong)ntohl(images.ep);
 	(*appl)(argc-1, &argv[1]);
-
 	return 0;
 }
 
@@ -464,14 +463,14 @@
 int do_bootm_subcommand (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	int ret = 0;
-	int state;
+	long state;
 	cmd_tbl_t *c;
 	boot_os_fn *boot_fn;
 
 	c = find_cmd_tbl(argv[1], &cmd_bootm_sub[0], ARRAY_SIZE(cmd_bootm_sub));
 
 	if (c) {
-		state = (int)c->cmd;
+		state = (long)c->cmd;
 
 		/* treat start special since it resets the state machine */
 		if (state == BOOTM_STATE_START) {