global: Migrate CONFIG_FLASH_OR_PRELIM to CFG

Perform a simple rename of CONFIG_FLASH_OR_PRELIM to CFG_FLASH_OR_PRELIM

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/p1_p2_rdb_pc.h b/include/configs/p1_p2_rdb_pc.h
index f328eda..41e7f53 100644
--- a/include/configs/p1_p2_rdb_pc.h
+++ b/include/configs/p1_p2_rdb_pc.h
@@ -191,7 +191,7 @@
 #define CFG_FLASH_BR_PRELIM (BR_PHYS_ADDR(CFG_SYS_FLASH_BASE_PHYS) \
 	| BR_PS_16 | BR_V)
 
-#define CONFIG_FLASH_OR_PRELIM	0xfc000ff7
+#define CFG_FLASH_OR_PRELIM	0xfc000ff7
 
 #define CFG_SYS_FLASH_BANKS_LIST	{CFG_SYS_FLASH_BASE_PHYS}