arm64: Drop broken non-mainline Synopsys USB driver
    
    For 13.2 a downstream USB driver was added (USB_EHCI_HCD_SYNOPSYS)
    for the Juno board (boo#902632). With 4.6 that driver no longer builds.
    
    A check of arch/arm64/boot/dts/arm/juno-base.dtsi indicates that it
    is using the "generic-ehci" compatible string, i.e. not this driver.
    
    Therefore drop these patches:
    patches.arch/arm64-0001-usb-Add-support-for-Synopsis-H20AHB-EHCI-host-contro.patch
    patches.arch/arm64-0002-usb-fix-hcd-h20ahb-driver-depends.patch
    
    Cc: Andreas Schwab <schwab@suse.de>
    Acked-by: Alexander Graf <agraf@suse.de>
    Signed-off-by: Andreas Färber <afaerber@suse.de>