env: mmc: Fix offset issue for env save

Fix the issue in commit 46c9016 ("env: mcc: Drop unnecessary #ifdefs")
If CONFIG_SYS_REDUNDAND_ENVIRONMENT is not defined, the offset value
becomes undetermined, so write env to unexpected offset.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/env/mmc.c b/env/mmc.c
index 8576141..5b01f65 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -273,11 +273,11 @@
 			if (ret)
 				goto fini;
 		}
+	}
 
-		if (mmc_get_env_addr(mmc, copy, &offset)) {
-			ret = 1;
-			goto fini;
-		}
+	if (mmc_get_env_addr(mmc, copy, &offset)) {
+		ret = 1;
+		goto fini;
 	}
 
 	printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);