ASoC: wm_adsp: Correct some minor issues

The wm_adsp_ops structures should be static and correct two printf
specifiers.

Fixes: 170b1e12 ("ASoC: wm_adsp: Add support for new Halo core DSPs")
Fixes: 4e08d50d

 ("ASoC: wm_adsp: Factor out DSP specific operations")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>