drm/i915: s/hdcp2_hdmi_msg_data/hdcp2_hdmi_msg_timeout/

The array is there only for timeout, "data" doesn't mean anything
so let's rename the thing to be more descriptive.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010145127.7487-2-ville.syrjala@linux.intel.com


Reviewed-by: Ramalingam C <ramalingam.c@intel.com>