redrix: enable usb_mux idle
redrix: enable usb_mux idle

Use the new API to put the mux in idle mode on suspend

BRANCH=none
BUG=b:233975818 b:245753005
TEST=BBR USB3_Connection bit is correct in S0ix/S0

Signed-off-by: Boris Mittelberg <46897f4fb5cad4b1d5146ad1fd460d7f4825bbf7@google.com>
Change-Id: Iadcbeb75b6918a69d183b1dbbc0d282804c3fd5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3938419
Reviewed-by: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec