imx6: aristainetos: add support for rev C board

add support for revision C boards. This board has
no longer a NAND.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/board/aristainetos/common/Kconfig b/board/aristainetos/common/Kconfig
index 6f1c825..e26de51 100644
--- a/board/aristainetos/common/Kconfig
+++ b/board/aristainetos/common/Kconfig
@@ -5,6 +5,7 @@
 	  2 version 2
 	  3 version 2b
 	  4 version 2bcsl
+	  5 version 2c
 
 config SYS_I2C_MXC_I2C1
 	default y