datapath: Remove compat workqueue.
OVS has its own workq implementation for coupe of reasons. first
was to avoid system freeze due to ovs-flow rehash softlockup.
We have moved out rehash from workq, So this problem does not exist.
second was related bugs in kernel workq implementation in pre-2.6.32
kernel. But we have dropped support for older kernel.
So there is no reason to keep ovs-workq around. Following patch
removes it.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>