i40e: Remove redundant memset

i40e: Remove redundant memset

Orabug: 24568124

Remove redundant call to memset before a call to memcpy.

The Coccinelle semantic patch used to make this change is as follows:
@@
expression e1,e2,e3,e4;
@@

- memset(e1,e2,e3);
  memcpy(e1,e4,e3);

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 4dec7d045d6d20afe794adbda5b6da2fe5d63a35)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>