drm/amd/display: Fix HostVMMinPageSize unit mismatch in DML2.1

drm/amd/display: Fix HostVMMinPageSize unit mismatch in DML2.1

[Why]
This was found back on DML2 but was missed when creating DML2.1.

The bottom layer calculation (CalculateHostVMDynamicLevels) expects
a value in bytes, not KB, but we pass in the value in KB (eg. 4).

This causes an extra page table level to be required in the prefetch
bytes which can be significant overhead - preventing some modes
from being supported that should otherwise be.

[How]
Correct the units by multiplying the input and override values by 1024.

Reviewed-by: Austin Zheng <austin.zheng@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>