drm/i915: PSR HSW/BDW: Fix inverted logic at sink main_link_active bit.

We have only two possible states with so many names and combinations that
might be confusing.

1 - Main link active / enabled / stand by / on
2 - Main link disabled / off / full off

Let's start organizing it by fixing a inverted logic when setting the sink bit.
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_psr.c

@@ -163,10 +163,10 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
 	/* Enable PSR in sink */
 	if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT || only_standby)
 		drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
-				   DP_PSR_ENABLE & ~DP_PSR_MAIN_LINK_ACTIVE);
+				   DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE);
 	else
 		drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
-				   DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE);
+				   DP_PSR_ENABLE & ~DP_PSR_MAIN_LINK_ACTIVE);
 
 	/* Setup AUX registers */
 	for (i = 0; i < sizeof(aux_msg); i += 4)