dma-resv: lockdep-prime address_space->i_mmap_rwsem for dma-resv

GPU drivers need this in their shrinkers, to be able to throw out
mmap'ed buffers. Note that we also need dma_resv_lock in shrinkers,
but that loop is resolved by trylocking in shrinkers.

So full hierarchy is now (ignore some of the other branches we already
have primed):

mmap_read_lock -> dma_resv -> shrinkers -> i_mmap_lock_write

I hope that's not inconsistent with anything mm or fs does, adding
relevant people.

Reviewed-by: Thomas Hellström <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Cc: Sumit Semwal <[email protected]>
Cc: "Christian König" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Dave Chinner <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Thomas Hellström (Intel) <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Maarten Lankhorst <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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