mb/google/guybrush/var/nipperkin: Configure Smart Card in normal mode

As per the schematics, smart card is expected to operate in normal mode
by default. So configure the SOC_SC_PWRSV gpio accordingly.

BUG=b:202992077
TEST=Build and boot to OS in Nipperkin board version 2.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I8e12600ad45734b144a30c868f0e4f323aa056f6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59984
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Jon Murphy <jpmurphy@google.com>
Reviewed-by: Rob Barnes <robbarnes@google.com>

src/mainboard/google/guybrush/variants/nipperkin/gpio.c

@@ -36,6 +36,8 @@ static const struct soc_amd_gpio bid2_override_gpio_table[] = {
 	PAD_NC(GPIO_17),
 	/* LCD_PRIVACY_PCH */
 	PAD_GPO(GPIO_18, HIGH),
+	/* SOC_SC_PWRSV */
+	PAD_GPO(GPIO_31, HIGH),
 };
 
 static const struct soc_amd_gpio override_early_gpio_table[] = {