vcl: cap epoll dequeue batch size to max events
vcl: cap epoll dequeue batch size to max events

Type: fix

Change-Id: Ia9be1413cf9423552137885521cefdbecc3e5df5
Signed-off-by: Florin Coras <c9715e5cdf0718c2e9b10678757dfb027875eba2@cisco.com>
Signed-off-by: Ping Yu <7ad42b0e23f558553a923ffd1f1105b254082d9f@intel.com>

chrisy/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp