ARM: tegra: select between Seaboard/Ventana at compile time

Seaboard and Ventana are very similar boards, and so share the seaboard.c
board file. The one difference needed so far is detected at run-time by
calling machine_is_ventana(). This bloats the Ventana build with code
that is never used. Switch to detecting Ventana at compile time to remove
bloat. This shaves ~5K off the SPL size on Ventana, and makes the SPL fit
within the max size.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

board/nvidia/seaboard/seaboard.c

@@ -34,7 +34,7 @@
 #endif
 
 /* TODO: Remove this code when the SPI switch is working */
-#ifndef CONFIG_SPI_UART_SWITCH
+#if !defined(CONFIG_SPI_UART_SWITCH) && (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA)
 /*
  * Routine: gpio_config_uart_seaboard
  * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
@@ -48,8 +48,6 @@ static void gpio_config_uart_seaboard(void)
 
 void gpio_early_init_uart(void)
 {
-	if (machine_is_ventana())
-		return;
 	gpio_config_uart_seaboard();
 }
 #endif