global: Migrate CONFIG_DW_WDT_CLOCK_KHZ to CFG

Perform a simple rename of CONFIG_DW_WDT_CLOCK_KHZ to CFG_DW_WDT_CLOCK_KHZ

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/socfpga_common.h b/include/configs/socfpga_common.h
index 088cd4d..d0f5331 100644
--- a/include/configs/socfpga_common.h
+++ b/include/configs/socfpga_common.h
@@ -64,7 +64,7 @@
 /*
  * L4 Watchdog
  */
-#define CONFIG_DW_WDT_CLOCK_KHZ		25000
+#define CFG_DW_WDT_CLOCK_KHZ		25000
 
 /*
  * NAND Support