arm64: defconfig: Visconti: Enable PCIe host controller

Enable Visconti's PCIe host controller in the ARM64 defconfig.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Link: https://lore.kernel.org/r/20210907042340.1525711-1-nobuhiro1.iwamatsu@toshiba.co.jp


Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>