flounder: update kernel prebuilt

b643152 net: wireless: bcmdhd: Check if FW is up during SAR setup

Bug: 23481741

Change-Id: Ic730d6712a9551a886578fc4668275aa4c653886
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/Image.gz-dtb b/Image.gz-dtb
index 82126bb..3485f45 100644
--- a/Image.gz-dtb
+++ b/Image.gz-dtb
Binary files differ