net/mvpp2: make private variables static
net/mvpp2: make private variables static

Mark internal variables static to avoid potential redefinition
errors later on.

Signed-off-by: Natalie Samsonov <334157704ab7e2b8e1b2652d747d1fd920233923@marvell.com>
Reviewed-by: Yelena Krivosheev <86cbf28d3aac395d915d79cf038bd25eb785cbf1@marvell.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk