LU-5275 lprocfs: replace LPROCFS with CONFIG_PROC_FS

LU-5275 lprocfs: replace LPROCFS with CONFIG_PROC_FS

Instead of defining LPROCFS if CONFIG_PROC_FS is defined and testing
for LPROCFS just test for CONFIG_PROC_FS. This reduces the need to
ensure that params_tree.h has been included everywhere.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: I1da970c5c932d329833d433615322a95b0c14011
Reviewed-on: http://review.whamcloud.com/13299
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>