ccd: change ap to cpu_uart_pty

cpu_uart_pty is the standard control name in servod,
so we should use it here as well.

BUG=chromium:571476
TEST=No

Change-Id: I6d8682ebbbe55bd58dd49ffd700aa8bf3fdcee38
Signed-off-by: Nick Sanders <nsanders@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/374698
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
2 files changed