drm/nouveau/disp/sor/gf119-: add method to control mst enable

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvif/cl5070.h

@@ -34,6 +34,7 @@ struct nv50_disp_mthd_v1 {
 #define NV50_DISP_MTHD_V1_SOR_HDMI_PWR                                     0x22
 #define NV50_DISP_MTHD_V1_SOR_LVDS_SCRIPT                                  0x23
 #define NV50_DISP_MTHD_V1_SOR_DP_PWR                                       0x24
+#define NV50_DISP_MTHD_V1_SOR_DP_MST_LINK                                  0x25
 #define NV50_DISP_MTHD_V1_PIOR_PWR                                         0x30
 	__u8  method;
 	__u16 hasht;
@@ -90,6 +91,12 @@ struct nv50_disp_sor_dp_pwr_v0 {
 	__u8  pad02[6];
 };
 
+struct nv50_disp_sor_dp_mst_link_v0 {
+	__u8  version;
+	__u8  state;
+	__u8  pad02[6];
+};
+
 struct nv50_disp_pior_pwr_v0 {
 	__u8  version;
 	__u8  state;