drm/amd/display: Add null pointer guards where needed

[Why]
Some functions whose output is typically checked for null are not being
checked for null at several call sites, causing some static analysis
tools to throw an error.

[How]
Add null pointer guards around functions that typically have them at
other call sites.

Tested-by: Daniel Wheeler <[email protected]>
Reviewed-by: Sung Lee <[email protected]>
Reviewed-by: Aric Cyr <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Josip Pavic <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

0 files changed, 0 insertions, 0 deletions