Kirkwood: Enable PCIe port 1 on QNAP TS-11x/TS-21x

Enable KW_PCIE1 on QNAP TS-11x/TS-21x devices as newer revisions
(rev 1.3) have a USB 3.0 chip from Etron on PCIe port 1.  Thanks
to Marek Vasut for identifying this issue!

Cc: <stable@vger.kernel.org> # v2.6.36.x
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Tested-by: Marek Vasut <marex@denx.de>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>