ASoC: Intel: Skylake: Fix a shift wrapping bug

"*val" is a u64.  It definitely looks like we intend to use the high 32
bits as well.

Fixes: 700a9a63 ("ASoC: Intel: Skylake: Add module instance id generation APIs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Kranthi G <gudishax.kranthikumar@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>