migrate_pages: move THP/hugetlb migration support check to simplify code

This is a code cleanup patch, no functionality change is expected.  After
the change, the line number reduces especially in the long
migrate_pages_batch().

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: "Huang, Ying" <[email protected]>
Suggested-by: Alistair Popple <[email protected]>
Reviewed-by: Zi Yan <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Baolin Wang <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Bharata B Rao <[email protected]>
Cc: Xin Hao <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions