isl923x: Set OTG enable debounce time to 150ms
isl923x: Set OTG enable debounce time to 150ms

The default setting is to wait 1.3s from receiving the command, to
enable the OTG output: that's too long, and makes time to active
base very long when running on battery.

BRANCH=none
BUG=b:76396020
TEST=Probe POGO 1/5 and one of the USB lines, check that time from
     connect to active USB is reduced to 580 ms (from 1920 ms).

Change-Id: Iee00fd27978434ccac052e60a94534919dc29f43
Signed-off-by: Nicolas Boichat <f3daba1cdc403799935674d3cd4b0e5bd1804232@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/981853
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

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