Fix delegation states from flags to state values!

They are not really flags. Also changed them to enum type.

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Acked-by: Frank S. Filz <ffilzlnx@mindspring.com>
Remove unused DELEG_REVOKED definition

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Acked-by: Frank S. Filz <ffilzlnx@mindspring.com>
Remove unneeded DELEG_RETURNED state

Delegation state DELEG_RETURNED is set when the state_t is about to be
deleted. This isn't needed, and removed DELEG_RETURNED as well.

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Acked-by: Frank S. Filz <ffilzlnx@mindspring.com>