EDP_Y_COORDINATE_ENABLE became a reserved register in display 13.
EDP_Y_COORDINATE_VALID have the same fate as EDP_Y_COORDINATE_ENABLE
but as we don't need it, removing the macro definition of it.

BSpec: 50422
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210421220224.200729-2-jose.souza@intel.com