ARM: dts: ls1021a: add PCIe dts node

LS1021a contains two PCIe controllers. The patch adds their node to
dts file.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
1 file changed