drm/i915/hdcp: Fix WARN_ON(data->k > INTEL_NUM_PIPES)

Initialize no. of streams transmitted on a port to zero
such that intel_hdcp_required_content_stream() can
prepared the content stream after subsequemt attmept to
enable hdcp after a HDCP failure.

v2:
- Initialize k at top level instead of else branch. [Jani]

Cc: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210119064655.1605-2-anshuman.gupta@intel.com

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

@@ -53,6 +53,8 @@ intel_hdcp_required_content_stream(struct intel_digital_port *dig_port)
 	bool enforce_type0 = false;
 	int k;
 
+	data->k = 0;
+
 	if (dig_port->hdcp_auth_status)
 		return 0;