RDS: fixed compilation warnings

RDS: fixed compilation warnings

Fixed the following compilation warnings:

net/rds/send.c: In function 'rds_send_xmit':
net/rds/send.c:299: warning: suggest parentheses around && within ||
net/rds/rdma.c: In function 'rds_cmsg_rdma_dest':
net/rds/rdma.c:697: warning: format '%Lx' expects type 'long long unsigned int', but argument 2 has type 'u32'
net/rds/ib_recv.c: In function 'rds_ib_srqs_init':
net/rds/ib_recv.c:1570: warning: 'return' with no value, in function returning non-void

Signed-off-by: Bang Nguyen <bang.nguyen@oracle.com>
Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>