staging: vt6656: revert : 64 bit- Correctly address void structure.

The patch is wrong and is partially reverted.

The NULL check of pTransmitKey->pvKeyTable is kept.

The problem was ultimately fixed by upstream commit.
1ee4c55f
staging: vt6656: Fix inconsistent structure packing

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: stable@vger.kernel.org # 3.8
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>