uboot-imx

x86: acpi: Make irqroute.asl common

The irqroute.asl file is already common enough to all x86 platforms.
Platform ASL files need only provide a irqroute.h to describe how
internal PCI devices and PCIe downstream port devices' INTx pins are
routed to which PIRQ pin.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>