drm/i915: Drop redundant address-of op before lttpr_common_caps array

The address-of op in front of an array is just an alias to using the
array on its own, so drop the op.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210412232413.2755054-2-imre.deak@intel.com