mm/resource: Use resource_overlaps() to simplify region_intersects()

The three checks in region_intersects() are basically an open-coded version
of resource_overlaps() - so use the real thing.

Also fix typos in comments while at it.

Signed-off-by: Wei Yang <[email protected]>
Reviewed-by: Like Xu <[email protected]>
Reviewed-by: Yuan Yao <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
[ Rewrote the changelog. ]
Signed-off-by: Ingo Molnar <[email protected]>

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