IB/hfi1: Remove redundant pageidx variable

In hfi1_user_exp_rcv_setup(), variable pageidx mirrors
variable tididx.  Remove pageidx and its use as an argument
to program_rcvarray().

Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/167329104365.1472990.14264918308557487946.stgit@awfm-02.cornelisnetworks.com


Signed-off-by: Leon Romanovsky <leon@kernel.org>