hammerhead: update prebuilt kernel

6a41db7 hammerhaed: audio: Add GPIO for Secondary AUXPCM
3cff9a6 ASoc: msm: Remove warning messsage about speaker power supply.
6c98d60 perf: Treat attr.config as u64 in perf_swevent_init()
285d689 arm/dt: hammerhead: fix erroneous gpio setting for charger irq
74f4b98 hammerhead_defconfig: Enable INPUT_KEYCHORD

Bug: 8951890
Change-Id: Iece6e4f07f6151b4d5d3e7b81e8d39dfa5578692
diff --git a/kernel b/kernel
index a568d4f..41ec61b 100644
--- a/kernel
+++ b/kernel
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