Fix GetPermissions bug.

Review URL: http://codereview.chromium.org/3046046
diff --git a/firmware/lib/tpm_lite/tlcl.c b/firmware/lib/tpm_lite/tlcl.c
index 23288ea..af9395d 100644
--- a/firmware/lib/tpm_lite/tlcl.c
+++ b/firmware/lib/tpm_lite/tlcl.c
@@ -290,7 +290,7 @@
 
   Memcpy(&cmd, &tpm_getpermissions_cmd, sizeof(cmd));
   ToTpmUint32(cmd.buffer + tpm_getpermissions_cmd.index, index);
-  TlclSendReceive(tpm_getpermissions_cmd.buffer, response, sizeof(response));
+  TlclSendReceive(cmd.buffer, response, sizeof(response));
   result = TpmReturnCode(response);
   if (result != TPM_SUCCESS) {
     return result;