arm64: layerscape: Move CONFIG_HAS_FSL_XHCI_USB to Kconfig

Use Kconfig to select QE-HDLC and USB pin-mux.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: York Sun <york.sun@nxp.com>