wandboard: use CONFIG_IS_ENABLED(SATA) instead of ifdef CONFIG_SATA

Prepare for linking setup_sata only when CONFIG_SATA/CONFIG_SPL_SATA
is defined.

Signed-off-by: Troy Kisky <troykiskyboundary@gmail.com>

board/wandboard/wandboard.c

@@ -352,9 +352,8 @@ static void setup_display(void)
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
-#ifdef CONFIG_SATA
-	setup_sata();
-#endif
+	if (CONFIG_IS_ENABLED(SATA))
+		setup_sata();
 
 	return 0;
 }