drm/i915: Include the global reset count for intel_engine_dump()

Since a global reset affects the engine, include that along side the
per-engine reset counter when pretty printing the engine state in
intel_engine_dump().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171208012303.25504-4-chris@chris-wilson.co.uk