imx6: add support for aristainetos2c_cslb board variant

add support for aristainetos2c_cslb board variant.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/board/aristainetos/common/Kconfig b/board/aristainetos/common/Kconfig
index 945a2c4..328243c 100644
--- a/board/aristainetos/common/Kconfig
+++ b/board/aristainetos/common/Kconfig
@@ -3,6 +3,7 @@
 	help
 	  version of aristainetos board version
 	  5 version 2c and 2d
+	  6 version 2c-cslb
 
 config SYS_I2C_MXC_I2C1
 	default y