mb/google/nissa/var/anraggar: Set EN_SPK_PA to low to avoid noise

In order to avoid the noise caused by the codec output to the audio
jack during the shutdown and poweron process, we will use GPP_A11 for
the codec power supply gate, keep low during the startup process, and
wait for the driver to turn on. This change does not affect the beep
output of depthcharge.

BUG=None
TEST=There is no squeaking sound when turning on and off

Change-Id: I5982be5a8d965086b46861f4c2c758d9bdee6e75
Signed-off-by: Jianeng Ceng <cengjianeng@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81629
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

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

@@ -11,6 +11,8 @@ static const struct pad_config override_gpio_table[] = {
 	PAD_CFG_GPI(GPP_A7, NONE, DEEP),
 	/* A8  : GPP_A8 ==> WWAN_RF_DISABLE_ODL */
 	PAD_CFG_GPO(GPP_A8, 1, DEEP),
+	/* A11 : GPP_A11 ==> EN_SPK_PA */
+	PAD_CFG_GPO(GPP_A11, 0, DEEP),
 	/* A18 : NC ==> HDMI_HPD_SRC*/
 	PAD_CFG_NF(GPP_A18, NONE, DEEP, NF1),