autostart: unify duplicated logic into the bootm code

Rather than having a bunch of random commands handle autostart behavior,
unify the logic in a single place.  This also fixes building of these

different commands when bootm is disabled.

Acked-by: Matthew McClintock <msm@freescale.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/common/cmd_ide.c b/common/cmd_ide.c
index 21fe1ea..7fbc053 100644
--- a/common/cmd_ide.c
+++ b/common/cmd_ide.c
@@ -356,7 +356,6 @@
 	ulong addr, cnt;
 	disk_partition_t info;
 	image_header_t *hdr;
-	int rcode = 0;
 #if defined(CONFIG_FIT)
 	const void *fit_hdr = NULL;
 #endif
@@ -495,19 +494,7 @@
 
 	load_addr = addr;
 
-	/* Check if we should attempt an auto-start */
-	if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
-		char *local_args[2];
-
-		local_args[0] = argv[0];
-		local_args[1] = NULL;
-
-		printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
-
-		do_bootm (cmdtp, 0, 1, local_args);
-		rcode = 1;
-	}
-	return rcode;
+	return bootm_maybe_autostart(cmdtp, argv[0]);
 }
 
 /* ------------------------------------------------------------------------- */