xfs: check the return value of sb_min_blocksize() in xfs_fs_fill_super

xfs: check the return value of sb_min_blocksize() in xfs_fs_fill_super

sb_min_blocksize() may return 0. Check its return value to avoid the
filesystem super block when sb->s_blocksize is 0.

Cc: stable@vger.kernel.org # v6.15
Fixes: a64e5a596067bd ("bdev: add back PAGE_SIZE block size validation for sb_set_blocksize()")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Link: https://patch.msgid.link/20251104125009.2111925-5-yangyongpeng.storage@gmail.com
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>