ARC: Move ENV_SIZE and ENV_OFFSET to Kconfig

Join the party of some ARM boards and drop more
items from include/configs/xxx.h.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/iot_devkit_defconfig b/configs/iot_devkit_defconfig
index 1b6dd9e..24bbe3f 100644
--- a/configs/iot_devkit_defconfig
+++ b/configs/iot_devkit_defconfig
@@ -5,6 +5,7 @@
 CONFIG_SYS_DCACHE_OFF=y
 CONFIG_TARGET_IOT_DEVKIT=y
 CONFIG_SYS_TEXT_BASE=0x00000000
+CONFIG_ENV_SIZE=0x1000
 CONFIG_SYS_CLK_FREQ=16000000
 CONFIG_LOCALVERSION="-iotdk-1.0"
 # CONFIG_ARCH_FIXUP_FDT_MEMORY is not set