arm: ls1021a: Enable PCIe in defconfigs

The patch enables PCIe in ls1021a defconfigs and
removes unused PCIe related macro defines.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
21 files changed