drm/amd/display: Correct MALL parameters for DCN42 soc bb

drm/amd/display: Correct MALL parameters for DCN42 soc bb

[Why & How]
The MALL and DCC parameters were copied and pasted from a previous ASIC
but the correct value per HW specification should all be 0.

If not correct this can impact urgent bandwidth calculation and PMO.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>