Disable audio and trigger an interrupt on each CAN packet

Audio was causing spurrious interrupts.  Exclude the kernel module to
fix it.

CAN was waiting until 1ms of deadtime on the bus, or 16 packets then
delivering them...  I patched the kernel to make it a module option, and
this sets it to deliver every packet.

Change-Id: I82c647390fa8b01949d7af910191aa9d9823a2f7
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/frc971/orin/build_rootfs.py b/frc971/orin/build_rootfs.py
index 92ff11c..e0559a1 100755
--- a/frc971/orin/build_rootfs.py
+++ b/frc971/orin/build_rootfs.py
@@ -1240,6 +1240,8 @@
         copyfile("root:root", "700", "root/trace.sh")
         copyfile("root:root", "440", "etc/sudoers")
         copyfile("root:root", "644", "etc/fstab")
+        copyfile("root:root", "644", "etc/modprobe.d/audio.conf")
+        copyfile("root:root", "644", "etc/modprobe.d/can.conf")
         copyfile("root:root", "644",
                  "var/nvidia/nvcam/settings/camera_overrides.isp")
         copyfile("root:root", "644", "/etc/ld.so.conf.d/yocto.conf")