oce: Simplify probe method

[freqlabs]

Summary

• Use existing struct pci_device_table and related macros for device matching.
• Put the relevant flags in the static array of supported devices, so we don't need to figure them out separately once we've matched a device.
• Use snprintf instead of sprintf as an extra safeguard against memory corruption.

No change in functionality.

[imp]

sys/dev/oce/oce_if.c

232–244

There's already a PCI structure defined for this: pci_device_table, though to be honest it's under documented.

[freqlabs]

Use existing struct pci_device_table and related macros as suggested by @imp