arc: Add virt_to_phys() stub
Commit cf7c93cdd755 "usb: ehci: Implement V2P mapping" introduced usage of virt_to_phys() in ehci-hcd.
Since there was no implementation of virt_to_phys() for ARC compi
arc: Add virt_to_phys() stub
Commit cf7c93cdd755 "usb: ehci: Implement V2P mapping" introduced usage of virt_to_phys() in ehci-hcd.
Since there was no implementation of virt_to_phys() for ARC compilation of the ehci-generic driver failed.
This change adds virt_to_phys() stub for ARC so now USB driver for AXS101 board could be built again.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Cc: Hans de Goede <hdegoede@redhat.com> Acked-by: Marek Vasut <marex@denx.de>
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