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

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

This reverts commit 7a0debdcf094fbe6c7b6fa1ae3219c0acad7e42d.

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>