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There are too many fields called 'res' so add prefix to make it easier
to track what the structures are.

Pure rename, no functionality change
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Sanyog Kale <sanyog.r.kale@intel.com>
Link: https://lore.kernel.org/r/20200215014740.27580-2-pierre-louis.bossart@linux.intel.com

Signed-off-by: Vinod Koul <vkoul@kernel.org>