shamu: update prebuilt kernel

97fbea8 Revert "msm: mdss: IOMMU ref count implementation"
12499da Revert "msm: mdss: distinguish between mdp and dsi bus votes"
d2ba894 Revert "msm: mdss: Cleanup iommu ref count implementation"

workaround for b/16876837 Watchdog resets with serial console disabled and
			  screen on, phone idle
Signed-off-by: Iliyan Malchev <malchev@google.com>

Change-Id: I88421a33c920fd4716d887874a399ad2e832c7d1
diff --git a/zImage-dtb b/zImage-dtb
index 7c03e7b..2894a6a 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ