LU-3319 lprocfs: update nodemap lproc to newer kernel

LU-3319 lprocfs: update nodemap lproc to newer kernel

The PDE macro no longer exist in newer kernels. This
patch moves the PDE usage in the nodemap layer to use
PDE_DATA which is support across all kernels.

Change-Id: Idcfb918e0d4e203ff0f9c6d838a68b1a204ee3bd
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Reviewed-on: http://review.whamcloud.com/9465
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Jenkins
Reviewed-by: Peng Tao <bergwolf@gmail.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>