[RFC PATCH 0/4 ] usb/acpi: To bind usb hub ports with acpi when not attached usb devices.

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Based on the Matthew Garrett's patch set.
[PATCH V2 1/4] ACPI: Fix up _PLD methods
[PATCH V2 2/4] ACPI: Add _PLD support
[PATCH V2 3/4] usb: Bind devices to ACPI devices when possible
[PATCH V2 4/4] usb: Set device removable state based on ACPI USB data

Add usb hub ports' platform_data to store acpi_handle. When a usb
hub is found, getting all ports' acpi handle and check port's connect
type through acpi method "_UPC" and "_PLD". When a usb device is found,
set it's removalbe depending on the port's connect type.

[RFC PATCH 1/4] usb: add struct usb_hub_port to store port related
[RFC PATCH 2/4] usb: add platform_data in the struct usb_hub_port
[RFC PATCH 3/4] usb/acpi: add the support of usb hub ports' acpi
[RFC PATCH 4/4] usb/acpi: add usb check for the connect type of usb

Best Regards 
Tianyu Lan 

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