global: Migrate CONFIG_SET_DFU_ALT_BUF_LEN to CFG

Perform a simple rename of CONFIG_SET_DFU_ALT_BUF_LEN to CFG_SET_DFU_ALT_BUF_LEN

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/odroid_xu3.h b/include/configs/odroid_xu3.h
index 7304851..58b5ee6 100644
--- a/include/configs/odroid_xu3.h
+++ b/include/configs/odroid_xu3.h
@@ -49,7 +49,7 @@
 	"params.bin raw 0x1880 0x20\0"
 
 /* Enable: board/samsung/common/misc.c to use set_dfu_alt_info() */
-#define CONFIG_SET_DFU_ALT_BUF_LEN	(SZ_1K)
+#define CFG_SET_DFU_ALT_BUF_LEN	(SZ_1K)
 
 /* Set soc_rev, soc_id, board_rev, board_name, fdtfile */
 #define CFG_ODROID_REV_AIN		9