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/corvus.h b/include/configs/corvus.h
index c7a3e47..8a61086 100644
--- a/include/configs/corvus.h
+++ b/include/configs/corvus.h
@@ -24,8 +24,8 @@
  */
 
 /* ARM asynchronous clock */
-#define CONFIG_SYS_AT91_SLOW_CLOCK      32768
-#define CONFIG_SYS_AT91_MAIN_CLOCK      12000000 /* from 12 MHz crystal */
+#define CFG_SYS_AT91_SLOW_CLOCK      32768
+#define CFG_SYS_AT91_MAIN_CLOCK      12000000 /* from 12 MHz crystal */
 
 /* serial console */
 #define CONFIG_USART_BASE		ATMEL_BASE_DBGU
@@ -63,10 +63,10 @@
 					  48, 49, 50, 51, 52, 53, 54, 55, \
 					  56, 57, 58, 59, 60, 61, 62, 63, }
 
-#define CONFIG_SYS_MASTER_CLOCK		132096000
+#define CFG_SYS_MASTER_CLOCK		132096000
 #define AT91_PLL_LOCK_TIMEOUT		1000000
-#define CONFIG_SYS_AT91_PLLA		0x20c73f03
-#define CONFIG_SYS_MCKR			0x1301
-#define CONFIG_SYS_MCKR_CSS		0x1302
+#define CFG_SYS_AT91_PLLA		0x20c73f03
+#define CFG_SYS_MCKR			0x1301
+#define CFG_SYS_MCKR_CSS		0x1302
 
 #endif