mb/google/nissa: Override GPIO_PCH_WP for pujjocento variant

According to the circuit schematic diagram, pujjocento uses GPP_E12
as a write-protected gpio,so it is necessary to add the GPIO_PCH_WP
definition for GPP_E12 in gpio.h.

BUG=b:422656149
BRANCH=none
TEST=wp status update verified by toggling it on and off.

Change-Id: I91081f1b0ce5cb2fb3a29b96c1dcc18774f70f09
Signed-off-by: Zhongtian Wu <wuzhongtian@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87967
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>

src/mainboard/google/brya/variants/pujjocento/gpio.c

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include <baseboard/gpio.h>
+#include <variant/gpio.h>
 #include <baseboard/variants.h>
 #include <soc/gpio.h>
 #include <types.h>

src/mainboard/google/brya/variants/pujjocento/include/variant/gpio.h

@@ -4,6 +4,9 @@
 #define VARIANT_GPIO_H
 
 #include <baseboard/gpio.h>
+#undef GPIO_PCH_WP
+/* WP signal to PCH */
+#define GPIO_PCH_WP		GPP_E12
 
 #define WWAN_FCPO	GPP_D6 /* FULL_CARD_POWER_OFF# */
 #define WWAN_RST	GPP_E17