drm/amd/display: Fix incorrect cursor position for dcn401

drm/amd/display: Fix incorrect cursor position for dcn401

[Why]
Incorrect cursor position calculation in some scenarios.  Also for
mirror and rotation cases.

[How]
Fix for incorrect cursor position.  Added new test scenarios for diags
cursor test.  Updated CRC for few of the diags cursor test scenarios.

Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Sridevi <sarvinde@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>