dt-bindings: rockchip,vop2: Add more endpoint definition

There are 2 HDMI, 2 DP, 2 eDP on rk3588, so add
corresponding endpoint definition for it.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231211115907.1785377-1-andyshrk@163.com

include/dt-bindings/soc/rockchip,vop2.h

@@ -10,5 +10,9 @@
 #define ROCKCHIP_VOP2_EP_LVDS0	5
 #define ROCKCHIP_VOP2_EP_MIPI1	6
 #define ROCKCHIP_VOP2_EP_LVDS1	7
+#define ROCKCHIP_VOP2_EP_HDMI1	8
+#define ROCKCHIP_VOP2_EP_EDP1	9
+#define ROCKCHIP_VOP2_EP_DP0	10
+#define ROCKCHIP_VOP2_EP_DP1	11
 
 #endif /* __DT_BINDINGS_ROCKCHIP_VOP2_H */