drm/amdgpu: fix uninitialized scalar variable warning

Clear warning that field bp is uninitialized when
calling amdgpu_virt_ras_add_bps.
Signed-off-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c

@@ -395,6 +395,8 @@ static void amdgpu_virt_add_bad_page(struct amdgpu_device *adev,
 	else
 		vram_usage_va = adev->mman.drv_vram_usage_va;
 
+	memset(&bp, 0, sizeof(bp));
+
 	if (bp_block_size) {
 		bp_cnt = bp_block_size / sizeof(uint64_t);
 		for (bp_idx = 0; bp_idx < bp_cnt; bp_idx++) {