mb/google/nightfury: Set internal pull-down for GPP_D19

Add internal pull-down for GPP_D19 to improve DMIC noise issue on
nightfury.

BUG=b:171669255
BRANCH=firmware-hatch-12672.B
TEST=Built and checked GPP_D19 voltage after booting

Change-Id: Ie63f260be3d6a55f91908db59312b3b0a8af98f4
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46816
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Bob Moragues <moragues@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/hatch/variants/nightfury/gpio.c

@@ -37,6 +37,8 @@ static const struct pad_config gpio_table[] = {
 
 	/* D16 : TOUCHSCREEN_INT_L */
 	PAD_CFG_GPI_APIC(GPP_D16, NONE, PLTRST, LEVEL, INVERT),
+	/* D19 : DMIC_CLK_0_SNDW4_CLK */
+	PAD_CFG_NF(GPP_D19, DN_20K, DEEP, NF1),
 
 	/* E4  : M2_SSD_PE_WAKE_ODL ==> NC */
 	PAD_NC(GPP_E4, NONE),