net/avp: disable in FreeBSD build with meson
net/avp: disable in FreeBSD build with meson

Disabled avp build in FreeBSD because it is not supported.
Added changes to enable avp build if it is Linux OS and
disable in FreeBSD.

Fixes: ed71204dd06c ("net/avp: add to meson build")
Cc: stable@dpdk.org

Signed-off-by: Agalya Babu RadhaKrishnan <2baaa1bc2a504c84a1a5042652d6f05aadf41117@intel.com>
Acked-by: Allain Legacy <cf9f8e06ab4540486643794deada051d3a16b292@windriver.com>

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