drm/i915/hdcp: Use correct aux for capability check scenario

Send the correct aux rather than the one derived
from intel_digital_port so that the HDCP version of both monitors
are fetched rather than just the primary one's

Signed-off-by: Suraj Kandpal <[e-mail]>
Reviewed-by: Uma Shankar <[e-mail]>
Signed-off-by: Uma Shankar <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

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

···
 int intel_dp_hdcp2_capable(struct intel_connector *connector,
 			   bool *capable)
 {
-	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
+	struct drm_dp_aux *aux;
 	u8 rx_caps[3];
 	int ret;
 
+	aux = intel_dp_hdcp_get_aux(connector);
+
 	*capable = false;
-	ret = drm_dp_dpcd_read(&dig_port->dp.aux,
+	ret = drm_dp_dpcd_read(aux,
 			       DP_HDCP_2_2_REG_RX_CAPS_OFFSET,
 			       rx_caps, HDCP_2_2_RXCAPS_LEN);
 	if (ret != HDCP_2_2_RXCAPS_LEN)