drm/i915/guc: Wait for ucode DMA transfer completion
We silently assumed that DMA transfer will be completed within assumed timeout and thus we were waiting only at last step for GuC to become ready. Add intermediate wait to catch unexpected delays in DMA transfer. Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171103151816.62048-2-michal.wajdeczko@intel.comSigned-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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