mb/google/ocelot/var/ocicat: Fix ELAN Touchpad i2c error

Revised the GPP_E18 configuration to use GPI IRQ.

BUG=b:473955137
TEST=Confirmed that the ELAN touchpad functionality
is operating correctly,and no occurrences of the
following error message are observed in the logs:
elan_i2c i2c-ELAN0000:00: invalid report id data (0)

Change-Id: Ie8fd2f13f5db4f830e4ffcd88a5a7b55f4d9bee3
Signed-off-by: Pierce Chou <chou.pierce@inventec.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90908
Reviewed-by: Pranava Y N <pranavayn@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/ocelot/variants/ocicat/gpio.c

@@ -209,8 +209,8 @@ static const struct pad_config gpio_table[] = {
 	PAD_NC(GPP_E16, NONE),
 	/* GPP_E17:     NC */
 	PAD_NC(GPP_E17, NONE),
-	/* GPP_E18:     THC0_SPI1_INT_N_TCH_PNL1 */
-	PAD_CFG_NF(GPP_E18, NONE, DEEP, NF3),
+	/* GPP_E18:     TCHPAD_INT_ODL */
+	PAD_CFG_GPI_IRQ_WAKE(GPP_E18, NONE, PWROK, LEVEL, INVERT),
 	/* GPP_E19:     NC */
 	PAD_NC(GPP_E19, NONE),
 	/* GPP_E20:     NC */