net/rds: remove the RDS specific path record caching

net/rds: remove the RDS specific path record caching

This patch partially reverts commit b12826152417 ("RDS: SA query
optimization"), which has RDS specific path record caching, and uses the
underlying ibacm path record caching. ibacm considers all <source,dest,N>
entries as a similar path record (N is the TOS). Thus, RDS needs to update
the SL manually during the QP creation. RDS also assumes that it is a 1:1
mapping in the TOS to SL mapping.

Orabug: 26124147

Signed-off-by: Wei Lin Guay <wei.lin.guay@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Reviewed-by: Avinash Repaka <avinash.repaka@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>