evb-rk3399: avoid redefinition of CONFIG_ENV_OFFSET

CONFIG_ENV_OFFSET is already defined in
include/configs/rockchip-common.h

For CONFIG_ROCKCHIP_BACK_TO_BROM=y we redefine CONFIG_ENV_OFFSET
to an unsuitable value. We were lucky to get a compiler warning.

Remove the incorrect redefinition.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

include/configs/evb_rk3399.h

@@ -10,12 +10,6 @@
 #include <configs/rk3399_common.h>
 
 #define CONFIG_SYS_MMC_ENV_DEV 1
-/*
- * SPL @ 32k for ~36k
- * ENV @ 96k
- * u-boot @ 128K
- */
-#define CONFIG_ENV_OFFSET (96 * 1024)
 
 #define SDRAM_BANK_SIZE			(2UL << 30)