global: Migrate CONFIG_VSC7385_IMAGE et al to CFG

Perform simple renames of:
   CONFIG_VSC7385_IMAGE to CFG_VSC7385_IMAGE
   CONFIG_VSC7385_IMAGE_SIZE to CFG_VSC7385_IMAGE_SIZE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/freescale/mpc837xerdb/mpc837xerdb.c b/board/freescale/mpc837xerdb/mpc837xerdb.c
index 8b1bfe0..97884a3 100644
--- a/board/freescale/mpc837xerdb/mpc837xerdb.c
+++ b/board/freescale/mpc837xerdb/mpc837xerdb.c
@@ -206,9 +206,9 @@
 {
 	int rc = 0;
 
-#ifdef CONFIG_VSC7385_IMAGE
-	if (vsc7385_upload_firmware((void *) CONFIG_VSC7385_IMAGE,
-		CONFIG_VSC7385_IMAGE_SIZE)) {
+#ifdef CFG_VSC7385_IMAGE
+	if (vsc7385_upload_firmware((void *) CFG_VSC7385_IMAGE,
+		CFG_VSC7385_IMAGE_SIZE)) {
 		puts("Failure uploading VSC7385 microcode.\n");
 		rc = 1;
 	}