drm/i915: Get rid of XE_LPD_CURSOR_OFFSETS

XE_LPD_CURSOR_OFFSETS is a duplicate of TGL_CURSOR_OFFSETS.
Just use the latter.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220623130900.26078-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>