net/mvpp2: do cosmetic changes to cookie usage
net/mvpp2: do cosmetic changes to cookie usage

No need to add high address to cookie on transmit side, as it has
already 64bit value

Signed-off-by: Yuri Chipchev <fa58be6b5752a34331c13589537dcfdcfdc71bae@marvell.com>
Reviewed-by: Liron Himi <df7a1fcdffe73785b04dbbbb050c783d856d9736@marvell.com>

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