drm/i915/psr/cnl: Set y-coordinate as valid in SDP

This was my bad, spec says that the name of this bit is
'Y-coordinate valid' but the values for it is:
0: Include Y-coordinate valid eDP1.4a
1: Do not include Y-coordinate valid eDP 1.4
So not setting it.

BSpec: 7713

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: NJosé Roberto de Souza <jose.souza@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180425212334.21109-4-jose.souza@intel.com

drivers/gpu/drm/i915/intel_psr.c

@@ -508,9 +508,8 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 	 * mesh at all with our frontbuffer tracking. And the hw alone isn't
 	 * good enough. */
 	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
-	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
-		val |= EDP_Y_COORDINATE_VALID | EDP_Y_COORDINATE_ENABLE;
-	}
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		val |= EDP_Y_COORDINATE_ENABLE;
 
 	val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency + 1);