mxsboot: fix tool name in usage message

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
diff --git a/tools/mxsboot.c b/tools/mxsboot.c
index 8246831..6c05aa4 100644
--- a/tools/mxsboot.c
+++ b/tools/mxsboot.c
@@ -453,7 +453,7 @@
 void usage(void)
 {
 	printf(
-		"Usage: mx28image [ops] <type> <infile> <outfile>\n"
+		"Usage: mxsboot [ops] <type> <infile> <outfile>\n"
 		"Augment BootStream file with a proper header for i.MX28 boot\n"
 		"\n"
 		"  <type>	type of image:\n"