DTS: t186-common: correct routing path for i2s3

DTS: t186-common: correct routing path for i2s3

bug 2016417

Change-Id: Id4550062e480ff082f50cb042fadbcbea88c08f6
Signed-off-by: Ahung Cheng <ahcheng@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1590438
Reviewed-by: Mohan Kumar D <mkumard@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Hayden Du <haydend@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>