drm/atomic: fix out of bounds read in for_each_*_in_state helpers
for_each_*_in_state validate array index after access to array elements, thus perform out of bounds read. Fix this by validating index in the first place and read array element iff validation was successful. Fixes: df63b999 ("drm/atomic: Add for_each_{connector,crtc,plane}_in_state helper macros") Signed-off-by: NAndrey Ryabinin <a.ryabinin@samsung.com> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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