doc: add tested Marvell integrated NIC platforms
doc: add tested Marvell integrated NIC platforms

Add tested Marvell integrated NIC platforms to v20.05 release notes.

Signed-off-by: Jerin Jacob <352c4d4f9291b869992ddb67daa45ddc149fed30@marvell.com>

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