mb/google/corsola: Enable the SD card reader

The Kingler board has an SD card reader connected via USB and can be
enabled by setting GPIO EN_PP3300_SDBRDG_X to output mode and activated.

BUG=b:211385131
TEST=boot kernel using SD card.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: I903731ea4906328b2f0f5a7c6c06bd9c964d24ec
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60780
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/corsola/Kconfig

@@ -55,7 +55,8 @@ config BOOT_DEVICE_SPI_FLASH_BUS
 
 config SDCARD_INIT
 	bool
-	default n
+	default y if BOARD_GOOGLE_KINGLER_COMMON
+	default n if BOARD_GOOGLE_KRABBY_COMMON
 
 config DRIVER_TPM_SPI_BUS
 	hex

src/mainboard/google/corsola/gpio.h

@@ -26,6 +26,9 @@
 #define GPIO_EN_SPK		GPIO(PERIPHERAL_EN3)
 #define GPIO_BEEP_ON		GPIO(PERIPHERAL_EN4)
 
+/* GPIOs for SD card */
+#define GPIO_EN_PP3300_SDBRDG_X	GPIO(PERIPHERAL_EN7)
+
 /* GPIOs for display */
 #define GPIO_AP_EDP_BKLTEN		GPIO(PERIPHERAL_EN5)
 #define GPIO_BL_PWM_1V8			GPIO(DISP_PWM)

src/mainboard/google/corsola/mainboard.c

@@ -4,6 +4,7 @@
 #include <bootmode.h>
 #include <console/console.h>
 #include <device/device.h>
+#include <gpio.h>
 #include <soc/msdc.h>
 #include <soc/spm.h>
 #include <soc/usb.h>
@@ -41,7 +42,9 @@ static void mainboard_init(struct device *dev)
 
 	if (CONFIG(SDCARD_INIT)) {
 		printk(BIOS_INFO, "SD card init\n");
-		mtk_msdc_configure_sdcard();
+
+		/* External SD Card connected via USB */
+		gpio_output(GPIO_EN_PP3300_SDBRDG_X, 1);
 	}
 
 	setup_usb_host();