net/octeontx: fix meson build for disabled drivers
net/octeontx: fix meson build for disabled drivers

Add a condition to check if octeontx drivers are disabled.
octeontx drivers are built only if dependent drivers i.e.
ethdev, mempool and common/octeontx are enabled.

Bugzilla ID: 387
Fixes: 7f615033d64f ("drivers/net: build Cavium NIC PMDs with meson")
Cc: stable@dpdk.org

Signed-off-by: Amit Gupta <6af5f4c119525abfaaeb3df4f623e5ddcbe47e39@marvell.com>
Reviewed-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>
Acked-by: Harman Kalra <568a3484dfecf16d6b30cd214c570848bb408570@marvell.com>

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