LU-2850 ptlrpc: handle sunrpc_cache_pipe_upcall change

LU-2850 ptlrpc: handle sunrpc_cache_pipe_upcall change

Currently the ptlrpc GSS code has a wrapper to call
sunrpc_cache_pipe_upcall which takes three arguments.
The cache_request argument is already stored in the
cache_detail structure which is passed in already. So
for 3.8 the cache_request was removed with commit
21cd1254d3402a72927ed744e8ac1a7cf532f1ea. This patch
enabled Lustre to detect this change and run on newer
kernels.

Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: I2be613d22aab5a0b8aa207a86e99fc63132affa0
Reviewed-on: http://review.whamcloud.com/8396
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Peng Tao <bergwolf@gmail.com>
Reviewed-by: Thomas Stibor <thomas@stibor.net>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>