drm/amdgpu: Clean up errors in tonga_ih.c

Fix the following errors reported by checkpatch:

ERROR: that open brace { should be on the previous line
Signed-off-by: Ran Sun <sunran001@208suo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -493,8 +493,7 @@ static void tonga_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 	adev->irq.ih_funcs = &tonga_ih_funcs;
 }
 
-const struct amdgpu_ip_block_version tonga_ih_ip_block =
-{
+const struct amdgpu_ip_block_version tonga_ih_ip_block = {
 	.type = AMD_IP_BLOCK_TYPE_IH,
 	.major = 3,
 	.minor = 0,