LU-4423 lnet: Drop unnecessary wrapper function srpc_post_active_rqtbuf

LU-4423 lnet: Drop unnecessary wrapper function srpc_post_active_rqtbuf

Remove the function srpc_post_active_rqtbuf() and replace its only call
with the function srpc_post_active_rdma() by adding appropriate parameters.

Change-Id: I0fcbfa6bc07f04ae218abac7d25264af7072b902
Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/18957
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Tested-by: Jenkins
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Frank Zago <fzago@cray.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>