staging: lustre: ldlm: ldlm_resource.c replace obsolete function with kstrtoul()
staging: lustre: ldlm: ldlm_resource.c replace obsolete function with kstrtoul()

- this change fixes the warning "WARNING: simple_strtoul is obsolete, use
kstrtoul instead"
- removed the unused var 'end' as this is no longer required for
  kstrtoul()

Signed-off-by: Anil Belur <d6e0e5c3b4a843824d922e1d502b6f6e375bb604@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs