ASoC: SOF: intel: remove duplicate include

Clean up the following includecheck warning:

./sound/soc/sof/intel/pci-tng.c: shim.h is included more than once.

No functional change.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210824030015.57267-1-deng.changcheng@zte.com.cnSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/pci-tng.c

@@ -15,7 +15,6 @@
 #include <sound/sof.h>
 #include "../ops.h"
 #include "atom.h"
-#include "shim.h"
 #include "../sof-pci-dev.h"
 #include "../sof-audio.h"