Revert "drm/amd/display: reduce stack for dml32_CalculatePrefetchSchedule"

Revert "drm/amd/display: reduce stack for dml32_CalculatePrefetchSchedule"

This reverts commit a1578bc78b639c0b8b27923ef3a602ba6d8b79f6.

This commit was a part of a patchset responsible for reducing the stack
size. However, after some other changes, this commit becomes
unnecessary, so we are reverting it here.

Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>