MFC 281932:
Rename the kld for oce(4) to if_oce.ko. ifconfig(8) has special knowledge
about kld filenames for network drivers that requires them to follow the
pattern of if_<foo>. This also fixes the existing documentation in the
manpage which says to use if_oce_load=YES in loader.conf.

PR: 199095

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Depend on the relevant header files.

Add a driver for Emulex OneConnect ethernet cards (10 Gbit PCIe)
A manpage will come in a future commit.

Submitted by: Naresh Raju Gottumukkala (emulex)