zerblebarn: Disable fpmcu_ec3po_interp_connect by default

For FPMCU development I typically don't want anything sitting between
me and the FPMCU UART. This turns off the ec3po interpreter so that
the "raw_fpmcu_uart_pty" works without dropping characters.

BRANCH=none
BUG=none
TEST=./util/flash_ec --board=hatch_fp --image=./build/hatch_fp/ec.bin
     sudo screen $(dut-control raw_fpmcu_uart_pty | cut -d: -f2)

Change-Id: I1e8726b0ad623c5b9ca4fecfef636fe66d4d48da
Reviewed-on: https://chromium-review.googlesource.com/1600758
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
1 file changed