ghost: disable ADC_CHANNELS_RUNTIME_CONFIG
ghost: disable ADC_CHANNELS_RUNTIME_CONFIG

ghost has no need for reconfiguring the ADC channels at runtime.

BRANCH=none
BUG=b:230813416
TEST=make passes

Change-Id: I2bdcd8bfa5d512ff29a33286ec298a6b5862e785
Signed-off-by: Caveh Jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3658336
Commit-Queue: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Reviewed-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>

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