net/mrvl: fix HIF objects allocation

net/mrvl: fix HIF objects allocation

1. Add checking for non-EAL threads.

2. Create hif objects on first use since sometimes on probe not all
   lcores are initialized and can be added later.
   In this case the hif objects for later cores were not created and
   this caused system crash.

Fixes: 0ddc9b815b11 ("net/mrvl: add net PMD skeleton")
Cc: stable@dpdk.org
Signed-off-by: Natalie Samsonov <nsamsono@marvell.com>