drm/amd/amdgpu: Fix some warnings in vce4

	struct amdgpu_ring *ring;

	uint32_t offset, size;

	uint32_t table_size = 0;

	struct mmsch_v1_0_cmd_direct_write direct_wt = {0};

	struct mmsch_v1_0_cmd_direct_read_modify_write direct_rd_mod_wt = {0};

	struct mmsch_v1_0_cmd_direct_polling direct_poll = {0};

	struct mmsch_v1_0_cmd_end end = {0};

	struct mmsch_v1_0_cmd_direct_write direct_wt = { { 0 } };

	struct mmsch_v1_0_cmd_direct_read_modify_write direct_rd_mod_wt = { { 0 } };

	struct mmsch_v1_0_cmd_direct_polling direct_poll = { { 0 } };

	struct mmsch_v1_0_cmd_end end = { { 0 } };

	uint32_t *init_table = adev->virt.mm_table.cpu_addr;

	struct mmsch_v1_0_init_header *header = (struct mmsch_v1_0_init_header *)init_table;