cr50: fix bitbang controls

String changes in cr50 broke servod again.
Update the regex in servod.

BUG=b:35648297
TEST=dut-control ec_uart_bitbang_en, dut-control ec_uart_bitbang_en:on

Change-Id: I33ac4ac718033cb3d97d1463469807f9ab3f771f
Reviewed-on: https://chromium-review.googlesource.com/773488
Commit-Ready: Nick Sanders <nsanders@chromium.org>
Tested-by: Nick Sanders <nsanders@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
1 file changed