ASoC: qdsp6: add ifdef CONFIG_OF around of_device_id

ASoC: qdsp6: add ifdef CONFIG_OF around of_device_id

Add ifdef CONFIG_OF around of_device_id table to fix below
W=1 compile test warning with !CONFIG_OF:

sound/soc/qcom/qdsp6/q6afe-clocks.c:254:34: warning: unused variable
 'q6afe_clock_device_id' [-Wunused-const-variable]

Fix this warning for across all qdsp6 drivers.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200925163552.20717-2-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>