imx: ventana: add EMMC configuration

Prepare for boards with EMMC instead of NAND flash

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/include/configs/gw_ventana.h b/include/configs/gw_ventana.h
index d51bcc9..1606f20 100644
--- a/include/configs/gw_ventana.h
+++ b/include/configs/gw_ventana.h
@@ -68,7 +68,7 @@
   #define CONFIG_SF_DEFAULT_MODE             (SPI_MODE_0)
 #endif
 
-#else
+#elif defined(CONFIG_SPL_NAND_SUPPORT)
 /* Enable NAND support */
 #define CONFIG_CMD_NAND
 #define CONFIG_CMD_NAND_TRIMFFS
@@ -227,9 +227,11 @@
 
 /* Persistent Environment Config */
 #ifdef CONFIG_SPI_FLASH
-#define CONFIG_ENV_IS_IN_SPI_FLASH
+  #define CONFIG_ENV_IS_IN_SPI_FLASH
+#elif defined(CONFIG_SPL_NAND_SUPPORT)
+  #define CONFIG_ENV_IS_IN_NAND
 #else
-#define CONFIG_ENV_IS_IN_NAND
+  #define CONFIG_ENV_IS_IN_MMC
 #endif
 #if defined(CONFIG_ENV_IS_IN_MMC)
   #define CONFIG_SYS_MMC_ENV_DEV         0