i40e: add a little more to an NVM update debug message

i40e: add a little more to an NVM update debug message

BugLink: http://bugs.launchpad.net/bugs/1547674
Add a little more detail to an NVM update debug message in order to
see the full ethtool request data.

Change-ID: Iab10437cb32d6fddc67ee347e7c0b42511e152cd
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Kevin Scott <kevin.c.scott@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 1d73b2db4b9f4c12d42451efd09887ff7b37b02d)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>