veyron_danger: Enable EDP display init

Danger has EDP, the original code was copied from Brain which
didn't.

BUG=none
BRANCH=none
TEST=built and booted on danger

Reviewed-on: https://chromium-review.googlesource.com/245161
Reviewed-by: Julius Werner <jwerner@chromium.org>
Change-Id: Ic8b3f685e08bb96125c57d42db6a10e348a1a096
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/284081

src/mainboard/google/veyron_danger/Kconfig

@@ -75,14 +75,6 @@ config CONSOLE_SERIAL_UART_ADDRESS
 	depends on CONSOLE_SERIAL_UART
 	default 0xFF690000
 
-# FIXME(dhendrix): This is a gross hack intended to get us past
-# display init which currently hangs the machine. It will be removed
-# once we've re-factored the display init code to properly handle
-# various types of displays.
-config SKIP_DISPLAY_INIT_HACK
-	int
-	default 1
-
 config PMIC_BUS
 	int
 	default 0

src/mainboard/google/veyron_danger/board.h

@@ -23,6 +23,7 @@
 #include <boardid.h>
 #include <gpio.h>
 
+#define GPIO_BACKLIGHT  GPIO(7, A, 3)
 #define GPIO_RESET	GPIO(0, B, 5)
 
 /* TODO: move setup_chromeos_gpios() here once bootblock code is in mainboard */

src/mainboard/google/veyron_danger/mainboard.c

@@ -128,3 +128,8 @@ void lb_board(struct lb_header *header)
 	dma->range_start = (uintptr_t)_dma_coherent;
 	dma->range_size = _dma_coherent_size;
 }
+
+void mainboard_power_on_backlight(void)
+{
+	gpio_output(GPIO_BACKLIGHT, 1);	/* BL_EN */
+}