Revert "drm/radeon/kms: switch back to min->max pll post divider iteration"

Revert "drm/radeon/kms: switch back to min->max pll post divider iteration"

This reverts commit ca89b6905d162f78392a0b2f19190264304252b8.

Remove this commit as it is no longer necessary. The relevant bugs
were fixed properly in:
drm/radeon/kms: hopefully fix pll issues for real (v3)
d0d5f2795d425345f0f3fa3d7f9937d599e61b19
drm/radeon/kms: add missing frac fb div flag for dce4+
c89f599b0132c6a708c0f4f889ce295d9511ba0d

This commit also broke certain ~5 Mhz modes on old arcade monitors,
so reverting this commit fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=29502

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>