dragon: Update prebuilt kernel to 64a3b8566cfbbeefda55c811b23538bb7c7dfb8d

Build: trybot-smaug-paladin/R48-7566.1.0-b580

Changes include:
* 64a3b85 CHROMIUM: drm/nouveau: Prevent page size promotion on remap
* eec61cd CHROMIUM: usb: gadget: composite: Fix potential use-after-free
* 2efe055 CHROMIUM: usb: gadget: Fix error handling in composite_os_desc_req_prepare()
* f2bf720 UPSTREAM: usb: gadget: composite: conditionally dequeue os_desc and setup requests
* d9ab979 UPSTREAM: usb: gadget: composite: introduce setup and os_desc pending flags
* 5cdc28d UPSTREAM: usb: gadget: composite: set our req->context to cdev
* 52c1999 CHROMIUM: ASoC: tegra210_rt5677: Keep hotwording DAPM path alive over suspend
* 2943cb2 Revert "CHROMIUM: Smaug: audio: Stop hotwording streams before suspend"
* 13d306e CHROMIUM: Smaug: audio: Stop hotwording streams before suspend
* 21951cf CHROMIUM: memory: tegra210: restore emc override clock rate after resume

Change-Id: I4a2c415d9840221cab5034807f4663aa47baeda9
diff --git a/Image.fit b/Image.fit
index 5a384fe..2414f3f 100644
--- a/Image.fit
+++ b/Image.fit
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