icorem6: Remove unused FEC configs

- IMX_FEC_BASE:  icorem6 using dts, no need for explicit base.
- CONFIG_ETHPRIME: ethprime env not using anywhere in the board.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

include/configs/imx6qdl_icore.h

@@ -168,10 +168,8 @@
 
 /* Ethernet */
 #ifdef CONFIG_FEC_MXC
-# define IMX_FEC_BASE			ENET_BASE_ADDR
 # define CONFIG_FEC_MXC_PHYADDR		0
 # define CONFIG_FEC_XCV_TYPE		RMII
-# define CONFIG_ETHPRIME		"FEC"
 
 # define CONFIG_MII
 #endif