mb/google/corsola: Use common mtk_display_init()

TEST=check FW screen on Steelix, Tentacruel and Starmie

Change-Id: I429218d59389a6ab86b522dd597c07fa5b8ea821
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79777
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/common/display.c

@@ -37,6 +37,12 @@ static struct panel_serializable_data *get_mipi_cmd_from_cbfs(struct panel_descr
 	return NULL;
 }
 
+__weak int mtk_edp_init(struct edid *edid)
+{
+	printk(BIOS_WARNING, "%s: Not supported\n", __func__);
+	return -1;
+}
+
 int mtk_display_init(void)
 {
 	struct edid edid;