Add support for Armada 3700 EHCI

[mw]

Summary

This patch reuses ehci_mv driver by adding a support for the new
compatible string and adding ehci_mv.c to list of available options
for arm64 platforms.

[emaste]

head/sys/dev/usb/controller/ehci_mv.c

180–181

can we use ofw_bus_search_compatible here, as in D12258?

[mw]

head/sys/dev/usb/controller/ehci_mv.c

180–181

Actually this code should be executed only for legacy devices using "mrvl,usb-ehci" compatible string, so ofw_bus_search_compatible is imo not sufficient.

Would you like to invert the condition to:

if ((ofw_bus_is_compatible(self, "mrvl,usb-ehci")) {

or can we leave it as-is now?

[• ian]

head/sys/dev/usb/controller/ehci_mv.c

180–181

The ocd_data field returned by ofw_bus_is_compatible() doesn't have to be just true/false. When you've got hardware that has a few small variations, you can use an enum with each compat string (see dev/sdhci/fsl_sdhci.c for an example). You could also do something like a set of bitmapped flags where different flag bits indicate different quirks.