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/bmips_bcm3380.h b/include/configs/bmips_bcm3380.h
index e40f110..0d254cd 100644
--- a/include/configs/bmips_bcm3380.h
+++ b/include/configs/bmips_bcm3380.h
@@ -14,7 +14,7 @@
 /* U-Boot */
 
 #if defined(CONFIG_BMIPS_BOOT_RAM)
-#define CONFIG_SYS_INIT_SP_OFFSET	SZ_8K
+#define CFG_SYS_INIT_SP_OFFSET	SZ_8K
 #endif
 
 #endif /* __CONFIG_BMIPS_BCM3380_H */