usb_mux: Simplify logging to reduce code size

BUG=none
BRANCH=none
TEST=make buildall

Change-Id: Ib2d9476e4740527ad2e1f73eeecb0306140b3f38
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1025118
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
1 file changed