ARM: dts: msm: Use the ultra low latency on 8916

System tone uses the low latency path on 8916, set the latency
level as ultra to use the ULL path on 8916.

Change-Id: I8028218654877e64b17f6be35ee9713b59a94518
Signed-off-by: Preetam Singh Ranawat <apranawat@codeaurora.org>