grouper bach: update prebuilt kernel

e89ad2b Clear the head of descriptor for the endpoint of gser and acm
port in the unbind function.
f45216b USB: cdc-acm: disconnect stuck issue and acm_tty_open crash
570847e Display: Bach: pclk change
dd886e4 mmc: tegra: Disable card and host clk separately

Change-Id: I261c804bbd7a48090cd6fbe35f8d62d2dbfb22a5
diff --git a/kernel b/kernel
index c806ccb..adc7d80 100644
--- a/kernel
+++ b/kernel
Binary files differ