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/arch/arm/mach-at91/include/mach/sama5d2.h b/arch/arm/mach-at91/include/mach/sama5d2.h
index 5ff20e9..567cdd3 100644
--- a/arch/arm/mach-at91/include/mach/sama5d2.h
+++ b/arch/arm/mach-at91/include/mach/sama5d2.h
@@ -238,7 +238,7 @@
 #define cpu_is_sama5d2	_cpu_is_sama5d2
 
 /* PIT Timer(PIT_PIIR) */
-#define CONFIG_SYS_TIMER_COUNTER	0xf804803c
+#define CFG_SYS_TIMER_COUNTER	0xf804803c
 
 #ifndef __ASSEMBLY__
 unsigned int get_chip_id(void);