xfs: replace XFS_FORCED_SHUTDOWN with xfs_is_shutdown

mainline inclusion
from mainline-v5.14-rc4
commit 75c8c50f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4KIAO
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75c8c50fa16a23f8ac89ea74834ae8ddd1558d75



--------------------------------

Remove the shouty macro and instead use the inline function that
matches other state/feature check wrapper naming. This conversion
was done with sed.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

Conflicts:
	fs/xfs/libxfs/xfs_btree.c
	fs/xfs/libxfs/xfs_ialloc.c
	fs/xfs/xfs_aops.c
	fs/xfs/xfs_bmap_util.c
	fs/xfs/xfs_buf.c
	fs/xfs/xfs_buf_item.c
	fs/xfs/xfs_icache.c
	fs/xfs/xfs_inode.c
	fs/xfs/xfs_mount.c
	fs/xfs/xfs_qm.c

Signed-off-by: Long Li <leo.lilong@huawei.com>