staging/lustre: fix coccinelle warnings

drivers/staging/lustre/lustre/llite/dir.c:1416:2-8: Replace memcpy with struct assignment

Generated by: coccinelle/misc/memcpy-assign.cocci

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

drivers/staging/lustre/lustre/llite/dir.c

@@ -1400,7 +1400,7 @@ static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		if (tmp == NULL)
 			GOTO(free_lmv, rc = -ENOMEM);
 
-		memcpy(tmp, &lum, sizeof(lum));
+		*tmp = lum;
 		tmp->lum_type = LMV_STRIPE_TYPE;
 		tmp->lum_stripe_count = 1;
 		mdtindex = ll_get_mdt_idx(inode);