global: Migrate CONFIG_ICS307_REFCLK_HZ to CFG

Perform a simple rename of CONFIG_ICS307_REFCLK_HZ to CFG_ICS307_REFCLK_HZ

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/T208xQDS.h b/include/configs/T208xQDS.h
index 7f332cf..3b98d25 100644
--- a/include/configs/T208xQDS.h
+++ b/include/configs/T208xQDS.h
@@ -13,7 +13,7 @@
 
 #include <linux/stringify.h>
 
-#define CONFIG_ICS307_REFCLK_HZ 25000000  /* ICS307 ref clk freq */
+#define CFG_ICS307_REFCLK_HZ 25000000  /* ICS307 ref clk freq */
 
 /* High Level Configuration Options */