[SCSI] mpt fusion: remove redundant memset

alloc_fcdev() calls alloc_netdev() which uses kzalloc to alloc all the
memory together with dev->priv region hence no zeroing of structs inside
struct mpt_lan_priv needed.

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Acked-by: "Moore, Eric Dean" <Eric.Moore@lsil.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>