NFSD: Fix sparse warning

[ Upstream commit c2f1c4bd

 ]

/home/cel/src/linux/linux/fs/nfsd/nfs4proc.c:1539:24: warning: incorrect type in assignment (different base types)
/home/cel/src/linux/linux/fs/nfsd/nfs4proc.c:1539:24:    expected restricted __be32 [usertype] status
/home/cel/src/linux/linux/fs/nfsd/nfs4proc.c:1539:24:    got int

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Stable-dep-of: 79a1d88a

 ("NFSD: pass range end to vfs_fsync_range() instead of count")
Signed-off-by: Sasha Levin <sashal@kernel.org>