drm/amdkfd: fix NULL ptr for debugfs mqds on GFX v12

mqd_stride function in gfx v12 is not implemented, that
causes NULL ptr error. Add the generic func to fix it.
Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c

@@ -389,6 +389,7 @@ struct mqd_manager *mqd_manager_init_v12(enum KFD_MQD_TYPE type,
 		mqd->is_occupied = kfd_is_occupied_cp;
 		mqd->mqd_size = sizeof(struct v12_compute_mqd);
 		mqd->get_wave_state = get_wave_state;
+		mqd->mqd_stride = kfd_mqd_stride;
 #if defined(CONFIG_DEBUG_FS)
 		mqd->debugfs_show_mqd = debugfs_show_mqd;
 #endif
@@ -404,6 +405,7 @@ struct mqd_manager *mqd_manager_init_v12(enum KFD_MQD_TYPE type,
 		mqd->destroy_mqd = kfd_destroy_mqd_cp;
 		mqd->is_occupied = kfd_is_occupied_cp;
 		mqd->mqd_size = sizeof(struct v12_compute_mqd);
+		mqd->mqd_stride = kfd_mqd_stride;
 #if defined(CONFIG_DEBUG_FS)
 		mqd->debugfs_show_mqd = debugfs_show_mqd;
 #endif
@@ -433,6 +435,7 @@ struct mqd_manager *mqd_manager_init_v12(enum KFD_MQD_TYPE type,
 		mqd->destroy_mqd = kfd_destroy_mqd_sdma;
 		mqd->is_occupied = kfd_is_occupied_sdma;
 		mqd->mqd_size = sizeof(struct v12_sdma_mqd);
+		mqd->mqd_stride = kfd_mqd_stride;
 #if defined(CONFIG_DEBUG_FS)
 		mqd->debugfs_show_mqd = debugfs_show_mqd_sdma;
 #endif