In case early transport is enabled SU area needs to be extended
to cover cursor area fully when cursor is in SU area.

Bspec: 68927
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231218175004.52875-3-jouni.hogander@intel.com