staging: lustre: replaced C99 comment style by C89 style

As per coding style guidelines C89 comment style /*...*/
is preferred over C99 comment style //, hence replaced
C99 comment style by C89 comment style to fix checkpatch
error

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Reviewed-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/lustre/lustre/lvfs/lvfs_linux.c b/drivers/staging/lustre/lustre/lvfs/lvfs_linux.c
index bb8b152..1ef06fe 100644
--- a/drivers/staging/lustre/lustre/lvfs/lvfs_linux.c
+++ b/drivers/staging/lustre/lustre/lvfs/lvfs_linux.c
@@ -114,7 +114,7 @@
 	if (new_ctx->dt != NULL)
 		return;
 
-	//ASSERT_NOT_KERNEL_CTXT("already in kernel context!\n");
+	/* ASSERT_NOT_KERNEL_CTXT("already in kernel context!\n"); */
 	ASSERT_CTXT_MAGIC(new_ctx->magic);
 	OBD_SET_CTXT_MAGIC(save);