Refactor siglen_map[] to store key size in bytes instead of 32-bit words.

Review URL: http://codereview.chromium.org/660261
diff --git a/utils/verify_data.c b/utils/verify_data.c
index c58b6fb..8a79d0f 100644
--- a/utils/verify_data.c
+++ b/utils/verify_data.c
@@ -74,8 +74,7 @@
     return 0;
   }
   /* Length of the RSA Signature/RSA Key */
-  sig_len = siglen_map[algorithm] * sizeof(uint32_t);
-
+  sig_len = siglen_map[algorithm]; 
   if (!(key = RSAPublicKeyFromFile(argv[2])))
     goto failure;
   if (!(signature = read_signature(argv[3], sig_len)))