mb/google/rauru: Pull HPD pin up

Pull HPD (Hot Plug Detect) pin up in order to detect the panel.

BRANCH=rauru
BUG=b:376357839
TEST=Verify FW screen on Navi and Hylia

Change-Id: Ie11ceabad0b9872729125936d90b93b5d6d7cea6
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86294
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/rauru/panel.c

@@ -31,6 +31,7 @@ static void power_on_load_switch(void)
 {
 	gpio_output(GPIO_EN_PP3300_EDP_X, 1);
 	gpio_set_mode(GPIO_EDP_HPD_1V8, GPIO_FUNC(EINT13, EDP_TX_HPD));
+	gpio_set_pull(GPIO_EDP_HPD_1V8, GPIO_PULL_ENABLE, GPIO_PULL_UP);
 }
 
 static struct panel_description edp_panel = {