net: phy: add MACsec ops in phy_device

This patch adds a reference to MACsec ops in the phy_device, to allow
PHYs to support offloading MACsec operations. The phydev lock will be
held while calling those helpers.

Change-Id: I7076430d419c1ff260380e42f48d6077d673ba3f
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: 2e18135845b359f26c37df38ba56565496517c10
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


[quic_krudrapa@quicinc.com: Fixed Merge conflicts ]
Signed-off-by: Karthik Rudrapatna <quic_krudrapa@quicinc.com>