drm/radeon/kms: more r4xx lvds fixes

Grab pll ref div from regs at driver init.  r4xx seems very
picky about the dividers for the pll driving lvds.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 89ac438..fba3c96 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -457,9 +457,8 @@
 				if (encoder->encoder_type !=
 				    DRM_MODE_ENCODER_DAC)
 					pll_flags |= RADEON_PLL_NO_ODD_POST_DIV;
-				if (!ASIC_IS_AVIVO(rdev)
-				    && (encoder->encoder_type ==
-					DRM_MODE_ENCODER_LVDS))
+				if (encoder->encoder_type ==
+					DRM_MODE_ENCODER_LVDS)
 					pll_flags |= RADEON_PLL_USE_REF_DIV;
 			}
 			radeon_encoder = to_radeon_encoder(encoder);