rename CFG_ENV macros to CONFIG_ENV

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index f449715..637d6c9 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -503,7 +503,7 @@
 		int val;
 
 		for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
-			if (nxt >= CFG_ENV_SIZE) {
+			if (nxt >= CONFIG_ENV_SIZE) {
 				return (NULL);
 			}
 		}
@@ -523,7 +523,7 @@
 		int val, n;
 
 		for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
-			if (nxt >= CFG_ENV_SIZE) {
+			if (nxt >= CONFIG_ENV_SIZE) {
 				return (-1);
 			}
 		}