Implement usage for --help and put the same information into the README, too.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2790 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/util/superiotool/superiotool.c b/util/superiotool/superiotool.c
index 2ff56fb..479c47f 100644
--- a/util/superiotool/superiotool.c
+++ b/util/superiotool/superiotool.c
@@ -164,7 +164,7 @@
 			exit(0);
 			break;
 		case 'h':
-			printf("Usage: superiotool [-d] [-V] [-v] [-h]\n");
+			printf(USAGE);
 			exit(0);
 			break;
 		default: