drm/i915/dpio: Remove pointless VLV_PCS01_DW8 read

We don't use the result of the VLV_PCS01_DW8 read at all,
so don't read.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240422083457.23815-2-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_dpio_phy.c

@@ -1134,7 +1134,6 @@ void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
 	vlv_dpio_get(dev_priv);
 
 	/* Enable clock channels for this port */
-	val = vlv_dpio_read(dev_priv, phy, VLV_PCS01_DW8(port));
 	val = 0;
 	if (pipe)
 		val |= (1<<21);