ASoC: wm_adsp: Remove pointless string comparison

The control fw_name is always directly assigned from the wm_adsp_fw_text
array, so it isn't necessary to compare the actual strings just the
pointer values.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210626155941.12251-3-ckeepax@opensource.cirrus.com


Signed-off-by: Mark Brown <broonie@kernel.org>