power/rk3399: Change fake GPIO
power/rk3399: Change fake GPIO

When building with clang, it warns:

power/rk3399.c:605:26: error: implicit conversion from enumeration type
'enum power_signal' to different enumeration type 'enum gpio_signal'
[-Werror,-Wenum-conversion]
                power_signal_interrupt(POWER_SIGNAL_COUNT);
                ~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~

It appears the intent is to derive a signal to send that is beyond the
number of power signals, but "enum gpio_signal" and "enum power_signal"
are separate enums, so POWER_SIGNAL_COUNT could be some other valid
GPIO.

Note that this is a functional change.

BRANCH=none
BUG=b:172020503
TEST=CC=clang make BOARD=scarlet

Signed-off-by: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>
Change-Id: Iba143e8903c11a4315e6b74fdb8e3245938b2b50
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3243007
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>

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