In Scarlet pwm regulatoror minimum value and maximum value differs from
other board variants, Correct it so we can get the right voltage.
Change-Id: I1f722eabb697b3438d9f4aa29c205b0161eb442a
Signed-off-by: Lin Huang <hl@rock-chips.com>
Reviewed-on: https://review.coreboot.org/20831
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>