LU-1346 libcfs: cleanup macros in kp30.h

LU-1346 libcfs: cleanup macros in kp30.h

Some macro cleanup in kp30.h

Some other changes:
. removes some unused/reduplicate macros such as
our_recalc_sigpending, prepare_work, cfs_get_work_data, strtok,
work_struct_t, SEM_COUNT, PORTAL_SYMBOL_REGISTER/UNREGISTER,
cfs_num_present_cpus, cfs_num_present_cpus
. moves some different kernel version compatible macros/inlines to
  portals_compat25.h
. needs not differentiate CONFIG_SMP for LASSERT_SPIN_LOCKED
. get/put_cpu is avaiable for both SMP and !SMP

This patch does not change LWT(Light-weight trace) related code.

Signed-off-by: Liu Xuezhao <xuezhao.liu@emc.com>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: Iaa3cda88d539f3d7e677b7accda99b476daeddca
Reviewed-on: http://review.whamcloud.com/4776
Reviewed-by: Keith Mannthey <keith.mannthey@intel.com>
Tested-by: Hudson
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Yang Sheng <yang.sheng@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>