staging/lustre/llite: Remove unnecessary check for NULL before iput()

iput() already checks for the inode being NULL, thus it's unnecessary to
check before calling.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/lustre/lustre/llite/llite_lib.c
Simple merge