ARM: tegra: use DT bindings for GPIO naming

There are currently many places that define the list of all Tegra GPIOs;
the DT binding header and custom Tegra-specific header file gpio.h. Fix
the redundancy by replacing everything with the DT binding header file.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/board/nvidia/p2571/p2571.c b/board/nvidia/p2571/p2571.c
index d80a7d0..7ce656f 100644
--- a/board/nvidia/p2571/p2571.c
+++ b/board/nvidia/p2571/p2571.c
@@ -58,6 +58,6 @@
 void start_cpu_fan(void)
 {
 	/* GPIO_PE4 is PS_VDD_FAN_ENABLE */
-	gpio_request(GPIO_PE4, "FAN_VDD");
-	gpio_direction_output(GPIO_PE4, 1);
+	gpio_request(TEGRA_GPIO(E, 4), "FAN_VDD");
+	gpio_direction_output(TEGRA_GPIO(E, 4), 1);
 }