i40e: avoid large memcpy by assigning struct

i40e: avoid large memcpy by assigning struct

BugLink: http://bugs.launchpad.net/bugs/1547674
Assign the i40e_pf structure directly instead of using a large memcpy,
which avoids a sparse warning and lets the compiler optimize the copy
since it knows the size of the structure in advance.

Change-ID: I17604e23be2616521eb760290befcb767b52b3f7
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from net-next commit 45d043597d2d0e780e768866c6fbfe8dbee5f2cf)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>