NFS: move the delegation_watermark module parameter

Keep the module_param_named next to the variable declaration instead of
somewhere unrelated, following the best practice in the rest of the
kernel.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20250718081509.2607553-4-hch@lst.de
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

Author: Christoph Hellwig

fs/nfs/delegation.c

@@ -29,6 +29,7 @@
 
 static atomic_long_t nfs_active_delegations;
 static unsigned nfs_delegation_watermark = NFS_DEFAULT_DELEGATION_WATERMARK;
+module_param_named(delegation_watermark, nfs_delegation_watermark, uint, 0644);
 
 static void __nfs_free_delegation(struct nfs_delegation *delegation)
 {
@@ -1573,5 +1574,3 @@ bool nfs4_delegation_flush_on_close(const struct inode *inode)
 	rcu_read_unlock();
 	return ret;
 }
-
-module_param_named(delegation_watermark, nfs_delegation_watermark, uint, 0644);