ipvs: fix sparse warnings in lblc and lblcr

kbuild test robot reports for sparse warnings in
commits c2a4ffb7 ("ipvs: convert lblc scheduler to rcu")
and c5549571 ("ipvs: convert lblcr scheduler to rcu").

Fix it by removing extra __rcu annotation.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>