board: cm_fx6: convert to DM_I2C

Conversion to DM_I2C is mandatory, enable DM_I2C to fix board
removal warning. Convert EEPROM access to use DM_I2C API.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/board/compulab/common/Makefile b/board/compulab/common/Makefile
index 7c8226e..c7b2237 100644
--- a/board/compulab/common/Makefile
+++ b/board/compulab/common/Makefile
@@ -4,6 +4,12 @@
 #
 # Author: Igor Grinberg <grinberg@compulab.co.il>
 
+CL_EEPROM=y
+
+ifdef CONFIG_TARGET_TRIMSLICE
+CL_EEPROM=
+endif
+
 obj-y				+= common.o
-obj-$(CONFIG_$(SPL_)SYS_I2C_LEGACY)	+= eeprom.o
+obj-$(CL_EEPROM)		+= eeprom.o
 obj-$(CONFIG_SMC911X)		+= omap3_smc911x.o