staging/lustre/libcfs: remove cfs_iswhite

Kernel provides isspace().

Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/lustre/include/linux/libcfs/libcfs_string.h
Simple merge

diff --cc drivers/staging/lustre/lnet/lnet/config.c
Simple merge

diff --cc drivers/staging/lustre/lustre/libcfs/libcfs_string.c
Simple merge