global: Move remaining CONFIG_SYS_* to CFG_SYS_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do
not easily transition to Kconfig. In many cases they likely should come
from the device tree instead. Move these out of CONFIG namespace and in
to CFG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/xea.h b/include/configs/xea.h
index 87f628d..b432ab2 100644
--- a/include/configs/xea.h
+++ b/include/configs/xea.h
@@ -16,9 +16,9 @@
 
 /* SPL */
 
-#define CONFIG_SYS_SPI_KERNEL_OFFS	SZ_1M
-#define CONFIG_SYS_SPI_ARGS_OFFS	SZ_512K
-#define CONFIG_SYS_SPI_ARGS_SIZE	SZ_32K
+#define CFG_SYS_SPI_KERNEL_OFFS	SZ_1M
+#define CFG_SYS_SPI_ARGS_OFFS	SZ_512K
+#define CFG_SYS_SPI_ARGS_SIZE	SZ_32K
 
 /* Memory configuration */
 #define PHYS_SDRAM_1			0x40000000	/* Base address */