ISL923x: Disable input regulation with function
ISL923x: Disable input regulation with function

Use same function to disable input regulation

BUG=b:224616537
BRANCH=none
TEST=make -j runtests

Signed-off-by: Sam Hurst <500b4cddcd66abe3fe333e92c4c95d7f41e62e4e@google.com>
Change-Id: Ieb844d931b7fdd93dc6fb8ca2b4f48ae2932344a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3602216
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>

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