drm/amdgpu: switch to common ras ta helper

TRIGGER_ERROR is common ras ta command for all the
ASICs that support RAS feature. switch to common helper
to avoid duplicate implementation per IP generation

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>