disp: msm: sde: separate out DSC 4HS config programming

Dedicated registers are introduced for DSC 4HS merge block
programming from MDSS.9.0. This change adds support in the
driver to identify the change using a DSC feature flag
and separates out 4HS merge block programming to use appropriate
registers based on the DSC HW feature.

Change-Id: Ia64a1ed4bc5f5f301ab422144916cdce2a1dadac
Signed-off-by: Michael Ru <mru@codeaurora.org>
Signed-off-by: Jeykumar Sankaran <quic_jeykumar@quicinc.com>

msm/sde/sde_hw_catalog.c

@@ -3295,7 +3295,8 @@ static int sde_dsc_parse_dt(struct device_node *np,
 			if (PROP_VALUE_ACCESS(prop_value, DSC_422, i))
 					set_bit(SDE_DSC_NATIVE_422_EN,
 						&dsc->features);
-
+			if (SDE_HW_MAJOR(sde_cfg->hw_rev) >= SDE_HW_MAJOR(SDE_HW_VER_900))
+				set_bit(SDE_DSC_4HS, &dsc->features);
 		} else {
 			set_bit(SDE_DSC_HW_REV_1_1, &dsc->features);
 		}