global: Migrate CONFIG_FSL_SERDES1 to CFG

Perform a simple rename of CONFIG_FSL_SERDES1 to CFG_FSL_SERDES1

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/MPC837XERDB.h b/include/configs/MPC837XERDB.h
index fad1615..9fc12da 100644
--- a/include/configs/MPC837XERDB.h
+++ b/include/configs/MPC837XERDB.h
@@ -149,7 +149,7 @@
 #define CFG_SYS_NS16550_COM2	(CONFIG_SYS_IMMR+0x4600)
 
 /* SERDES */
-#define CONFIG_FSL_SERDES1	0xe3000
+#define CFG_FSL_SERDES1	0xe3000
 #define CONFIG_FSL_SERDES2	0xe3100
 
 /* I2C */