drm: Introduce helper for replacing blob properties
Introduce a common helper for the pattern of:
- allocate new blob property
- potentially free old blob property
- replace content of indicative property with new blob ID
- change member pointer on modeset object
Signed-off-by: Daniel Stone <[email protected]>
Cc: Dave Airlie <[email protected]>
Reviewed-by: Maarten Lankhorst <[email protected]>
[danvet: Squash in fixup from Daniel for the kerneldoc, reported by
0day builder.]
Signed-off-by: Daniel Vetter <[email protected]>