servo_v4p1: fix DisplayPort muxing
servo_v4p1: fix DisplayPort muxing

Now we are using a 'standard' usb_mux driver for the TUSB1064 superspeed
mux, ensure the mux configuration we are sending is matching our
convention. The previous custom driver had different parameters.
Also remove the direct calls to the driver.

Signed-off-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

BUG=b:150614702
BRANCH=servo
TEST=put the servo in SRC mode with the DP enabled on 4 lanes
by using the commands: 'cc src' then 'usbc dp enabled', 'usbc dp mf 0'
then plug a screen on the servo v4.1 HDMI receptable and get a proper image
when connecting the USB-C plug to a Chromebook with both polarities

Change-Id: I433c0055ce9b77d82075c09eec5a7eecd36006b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2684413
Tested-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Commit-Queue: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

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