drm/i915/guc: Pick better place for Guc final status message

GuC status message printed right after firmware upload may be too
optimistic, as we may fail on subsequent steps. Move that message
to the end of intel_uc_init_hw where we know the status for sure.

v2: use dev_info (Chris)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171016144724.17244-9-michal.wajdeczko@intel.com